// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2016 MediaTek Inc.
 * Author: PC Chen <pc.chen@mediatek.com>
 *         Tiffany Lin <tiffany.lin@mediatek.com>
 */

#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>

#include "mtk_vcodec_dec_drv.h"
#include "mtk_vcodec_dec.h"
#include "vdec_drv_if.h"
#include "mtk_vcodec_dec_pm.h"

#define DFT_CFG_WIDTH   MTK_VDEC_MIN_W
#define DFT_CFG_HEIGHT  MTK_VDEC_MIN_H

static const struct mtk_video_fmt *
mtk_vdec_find_format(struct v4l2_format *f,
                     const struct mtk_vcodec_dec_pdata *dec_pdata)
{
        const struct mtk_video_fmt *fmt;
        unsigned int k;

        for (k = 0; k < *dec_pdata->num_formats; k++) {
                fmt = &dec_pdata->vdec_formats[k];
                if (fmt->fourcc == f->fmt.pix_mp.pixelformat)
                        return fmt;
        }

        return NULL;
}

static bool mtk_vdec_get_cap_fmt(struct mtk_vcodec_dec_ctx *ctx, int format_index)
{
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;
        const struct mtk_video_fmt *fmt;
        struct mtk_q_data *q_data;
        int num_frame_count = 0, i;
        bool ret = false;

        fmt = &dec_pdata->vdec_formats[format_index];
        for (i = 0; i < *dec_pdata->num_formats; i++) {
                if (dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME)
                        continue;

                num_frame_count++;
        }

        if (num_frame_count == 1 || (!ctx->is_10bit_bitstream && fmt->fourcc == V4L2_PIX_FMT_MM21))
                return true;

        q_data = &ctx->q_data[MTK_Q_DATA_SRC];
        switch (q_data->fmt->fourcc) {
        case V4L2_PIX_FMT_H264_SLICE:
                if (ctx->is_10bit_bitstream && fmt->fourcc == V4L2_PIX_FMT_MT2110R)
                        ret = true;
                break;
        case V4L2_PIX_FMT_VP9_FRAME:
        case V4L2_PIX_FMT_AV1_FRAME:
        case V4L2_PIX_FMT_HEVC_SLICE:
                if (ctx->is_10bit_bitstream && fmt->fourcc == V4L2_PIX_FMT_MT2110T)
                        ret = true;
                break;
        default:
                break;
        }

        return ret;
}

static struct mtk_q_data *mtk_vdec_get_q_data(struct mtk_vcodec_dec_ctx *ctx,
                                              enum v4l2_buf_type type)
{
        if (V4L2_TYPE_IS_OUTPUT(type))
                return &ctx->q_data[MTK_Q_DATA_SRC];

        return &ctx->q_data[MTK_Q_DATA_DST];
}

static int stateful_try_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        return v4l2_m2m_ioctl_try_decoder_cmd(file, priv, cmd);
}

static int stateful_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        struct vb2_queue *src_vq, *dst_vq;
        int ret;

        ret = stateful_try_decoder_cmd(file, priv, cmd);
        if (ret)
                return ret;

        mtk_v4l2_vdec_dbg(1, ctx, "decoder cmd=%u", cmd->cmd);
        dst_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
                                V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
        switch (cmd->cmd) {
        case V4L2_DEC_CMD_STOP:
                src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
                                V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
                if (!vb2_is_streaming(src_vq)) {
                        mtk_v4l2_vdec_dbg(1, ctx, "Output stream is off. No need to flush.");
                        return 0;
                }
                if (!vb2_is_streaming(dst_vq)) {
                        mtk_v4l2_vdec_dbg(1, ctx, "Capture stream is off. No need to flush.");
                        return 0;
                }
                v4l2_m2m_buf_queue(ctx->m2m_ctx, &ctx->empty_flush_buf.vb);
                v4l2_m2m_try_schedule(ctx->m2m_ctx);
                break;

        case V4L2_DEC_CMD_START:
                vb2_clear_last_buffer_dequeued(dst_vq);
                break;

        default:
                return -EINVAL;
        }

        return 0;
}

static int stateless_try_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        return v4l2_m2m_ioctl_stateless_try_decoder_cmd(file, priv, cmd);
}

static int stateless_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        int ret;

        ret = v4l2_m2m_ioctl_stateless_try_decoder_cmd(file, priv, cmd);
        if (ret)
                return ret;

        mtk_v4l2_vdec_dbg(3, ctx, "decoder cmd=%u", cmd->cmd);
        switch (cmd->cmd) {
        case V4L2_DEC_CMD_FLUSH:
                /*
                 * If the flag of the output buffer is equals V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF,
                 * this command will prevent dequeueing the capture buffer containing the last
                 * decoded frame. Or do nothing
                 */
                break;
        default:
                mtk_v4l2_vdec_err(ctx, "invalid stateless decoder cmd=%u", cmd->cmd);
                return -EINVAL;
        }

        return 0;
}

static int vidioc_try_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);

        if (ctx->dev->vdec_pdata->uses_stateless_api)
                return stateless_try_decoder_cmd(file, priv, cmd);

        return stateful_try_decoder_cmd(file, priv, cmd);
}

static int vidioc_decoder_cmd(struct file *file, void *priv, struct v4l2_decoder_cmd *cmd)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);

        if (ctx->dev->vdec_pdata->uses_stateless_api)
                return stateless_decoder_cmd(file, priv, cmd);

        return stateful_decoder_cmd(file, priv, cmd);
}

void mtk_vdec_unlock(struct mtk_vcodec_dec_ctx *ctx)
{
        mutex_unlock(&ctx->dev->dec_mutex[ctx->hw_id]);
}

void mtk_vdec_lock(struct mtk_vcodec_dec_ctx *ctx)
{
        mutex_lock(&ctx->dev->dec_mutex[ctx->hw_id]);
}

void mtk_vcodec_dec_release(struct mtk_vcodec_dec_ctx *ctx)
{
        vdec_if_deinit(ctx);
        ctx->state = MTK_STATE_FREE;
}

void mtk_vcodec_dec_set_default_params(struct mtk_vcodec_dec_ctx *ctx)
{
        struct mtk_q_data *q_data;

        ctx->m2m_ctx->q_lock = &ctx->dev->dev_mutex;
        ctx->fh.m2m_ctx = ctx->m2m_ctx;
        ctx->fh.ctrl_handler = &ctx->ctrl_hdl;
        INIT_WORK(&ctx->decode_work, ctx->dev->vdec_pdata->worker);
        ctx->colorspace = V4L2_COLORSPACE_REC709;
        ctx->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
        ctx->quantization = V4L2_QUANTIZATION_DEFAULT;
        ctx->xfer_func = V4L2_XFER_FUNC_DEFAULT;

        q_data = &ctx->q_data[MTK_Q_DATA_SRC];
        memset(q_data, 0, sizeof(struct mtk_q_data));
        q_data->visible_width = DFT_CFG_WIDTH;
        q_data->visible_height = DFT_CFG_HEIGHT;
        q_data->fmt = ctx->dev->vdec_pdata->default_out_fmt;
        q_data->field = V4L2_FIELD_NONE;

        q_data->sizeimage[0] = DFT_CFG_WIDTH * DFT_CFG_HEIGHT;
        q_data->bytesperline[0] = 0;

        q_data = &ctx->q_data[MTK_Q_DATA_DST];
        memset(q_data, 0, sizeof(struct mtk_q_data));
        q_data->visible_width = DFT_CFG_WIDTH;
        q_data->visible_height = DFT_CFG_HEIGHT;
        q_data->coded_width = DFT_CFG_WIDTH;
        q_data->coded_height = DFT_CFG_HEIGHT;
        q_data->fmt = ctx->dev->vdec_pdata->default_cap_fmt;
        q_data->field = V4L2_FIELD_NONE;

        q_data->sizeimage[0] = q_data->coded_width * q_data->coded_height;
        q_data->bytesperline[0] = q_data->coded_width;
        q_data->sizeimage[1] = q_data->sizeimage[0] / 2;
        q_data->bytesperline[1] = q_data->coded_width;
}

static int vidioc_vdec_qbuf(struct file *file, void *priv,
                            struct v4l2_buffer *buf)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);

        if (ctx->state == MTK_STATE_ABORT) {
                mtk_v4l2_vdec_err(ctx, "[%d] Call on QBUF after unrecoverable error", ctx->id);
                return -EIO;
        }

        return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
}

static int vidioc_vdec_dqbuf(struct file *file, void *priv,
                             struct v4l2_buffer *buf)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);

        if (ctx->state == MTK_STATE_ABORT) {
                mtk_v4l2_vdec_err(ctx, "[%d] Call on DQBUF after unrecoverable error", ctx->id);
                return -EIO;
        }

        return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
}

static int vidioc_vdec_querycap(struct file *file, void *priv,
                                struct v4l2_capability *cap)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        struct device *dev = &ctx->dev->plat_dev->dev;

        strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
        snprintf(cap->card, sizeof(cap->card), "MT%d video decoder", ctx->dev->chip_name);

        return 0;
}

static int vidioc_vdec_subscribe_evt(struct v4l2_fh *fh,
                                     const struct v4l2_event_subscription *sub)
{
        struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(fh);

        if (ctx->dev->vdec_pdata->uses_stateless_api)
                return v4l2_ctrl_subscribe_event(fh, sub);

        switch (sub->type) {
        case V4L2_EVENT_EOS:
                return v4l2_event_subscribe(fh, sub, 2, NULL);
        case V4L2_EVENT_SOURCE_CHANGE:
                return v4l2_src_change_event_subscribe(fh, sub);
        default:
                return v4l2_ctrl_subscribe_event(fh, sub);
        }
}

static int vidioc_try_fmt(struct mtk_vcodec_dec_ctx *ctx, struct v4l2_format *f,
                          const struct mtk_video_fmt *fmt)
{
        struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
        const struct v4l2_frmsize_stepwise *frmsize;

        pix_fmt_mp->field = V4L2_FIELD_NONE;

        /* Always apply frame size constraints from the coded side */
        if (V4L2_TYPE_IS_OUTPUT(f->type))
                frmsize = &fmt->frmsize;
        else
                frmsize = &ctx->q_data[MTK_Q_DATA_SRC].fmt->frmsize;

        pix_fmt_mp->width = clamp(pix_fmt_mp->width, MTK_VDEC_MIN_W, frmsize->max_width);
        pix_fmt_mp->height = clamp(pix_fmt_mp->height, MTK_VDEC_MIN_H, frmsize->max_height);

        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                pix_fmt_mp->num_planes = 1;
                pix_fmt_mp->plane_fmt[0].bytesperline = 0;
        } else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                int tmp_w, tmp_h;

                /*
                 * Find next closer width align 64, height align 64, size align
                 * 64 rectangle
                 * Note: This only get default value, the real HW needed value
                 *       only available when ctx in MTK_STATE_HEADER state
                 */
                tmp_w = pix_fmt_mp->width;
                tmp_h = pix_fmt_mp->height;
                v4l_bound_align_image(&pix_fmt_mp->width, MTK_VDEC_MIN_W, frmsize->max_width, 6,
                                      &pix_fmt_mp->height, MTK_VDEC_MIN_H, frmsize->max_height, 6,
                                      9);

                if (pix_fmt_mp->width < tmp_w &&
                    (pix_fmt_mp->width + 64) <= frmsize->max_width)
                        pix_fmt_mp->width += 64;
                if (pix_fmt_mp->height < tmp_h &&
                    (pix_fmt_mp->height + 64) <= frmsize->max_height)
                        pix_fmt_mp->height += 64;

                mtk_v4l2_vdec_dbg(0, ctx,
                                  "before resize wxh=%dx%d, after resize wxh=%dx%d, sizeimage=%d",
                                  tmp_w, tmp_h, pix_fmt_mp->width, pix_fmt_mp->height,
                                  pix_fmt_mp->width * pix_fmt_mp->height);

                pix_fmt_mp->num_planes = fmt->num_planes;
                pix_fmt_mp->plane_fmt[0].sizeimage =
                                pix_fmt_mp->width * pix_fmt_mp->height;
                pix_fmt_mp->plane_fmt[0].bytesperline = pix_fmt_mp->width;

                if (pix_fmt_mp->num_planes == 2) {
                        pix_fmt_mp->plane_fmt[1].sizeimage =
                                (pix_fmt_mp->width * pix_fmt_mp->height) / 2;
                        pix_fmt_mp->plane_fmt[1].bytesperline =
                                pix_fmt_mp->width;
                }
        }

        pix_fmt_mp->flags = 0;
        return 0;
}

static int vidioc_try_fmt_vid_cap_mplane(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        const struct mtk_video_fmt *fmt;
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;

        fmt = mtk_vdec_find_format(f, dec_pdata);
        if (!fmt) {
                f->fmt.pix.pixelformat =
                        ctx->q_data[MTK_Q_DATA_DST].fmt->fourcc;
                fmt = mtk_vdec_find_format(f, dec_pdata);
        }

        return vidioc_try_fmt(ctx, f, fmt);
}

static int vidioc_try_fmt_vid_out_mplane(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
        const struct mtk_video_fmt *fmt;
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;

        fmt = mtk_vdec_find_format(f, dec_pdata);
        if (!fmt) {
                f->fmt.pix.pixelformat =
                        ctx->q_data[MTK_Q_DATA_SRC].fmt->fourcc;
                fmt = mtk_vdec_find_format(f, dec_pdata);
        }

        if (pix_fmt_mp->plane_fmt[0].sizeimage == 0) {
                mtk_v4l2_vdec_err(ctx, "sizeimage of output format must be given");
                return -EINVAL;
        }

        return vidioc_try_fmt(ctx, f, fmt);
}

static int vidioc_vdec_g_selection(struct file *file, void *priv,
                        struct v4l2_selection *s)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        struct mtk_q_data *q_data;

        if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        q_data = &ctx->q_data[MTK_Q_DATA_DST];

        switch (s->target) {
        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
                s->r.left = 0;
                s->r.top = 0;
                s->r.width = ctx->picinfo.pic_w;
                s->r.height = ctx->picinfo.pic_h;
                break;
        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
                s->r.left = 0;
                s->r.top = 0;
                s->r.width = ctx->picinfo.buf_w;
                s->r.height = ctx->picinfo.buf_h;
                break;
        case V4L2_SEL_TGT_COMPOSE:
                if (vdec_if_get_param(ctx, GET_PARAM_CROP_INFO, &(s->r))) {
                        /* set to default value if header info not ready yet*/
                        s->r.left = 0;
                        s->r.top = 0;
                        s->r.width = q_data->visible_width;
                        s->r.height = q_data->visible_height;
                }
                break;
        default:
                return -EINVAL;
        }

        if (ctx->state < MTK_STATE_HEADER) {
                /* set to default value if header info not ready yet*/
                s->r.left = 0;
                s->r.top = 0;
                s->r.width = q_data->visible_width;
                s->r.height = q_data->visible_height;
                return 0;
        }

        return 0;
}

static int vidioc_vdec_s_selection(struct file *file, void *priv,
                                struct v4l2_selection *s)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);

        if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        switch (s->target) {
        case V4L2_SEL_TGT_COMPOSE:
                s->r.left = 0;
                s->r.top = 0;
                s->r.width = ctx->picinfo.pic_w;
                s->r.height = ctx->picinfo.pic_h;
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int vidioc_vdec_s_fmt(struct file *file, void *priv,
                             struct v4l2_format *f)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        struct v4l2_pix_format_mplane *pix_mp;
        struct mtk_q_data *q_data;
        int ret = 0;
        const struct mtk_video_fmt *fmt;
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;

        mtk_v4l2_vdec_dbg(3, ctx, "[%d]", ctx->id);

        q_data = mtk_vdec_get_q_data(ctx, f->type);
        if (!q_data)
                return -EINVAL;

        pix_mp = &f->fmt.pix_mp;
        /*
         * Setting OUTPUT format after OUTPUT buffers are allocated is invalid
         * if using the stateful API.
         */
        if (!dec_pdata->uses_stateless_api &&
            f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE &&
            vb2_is_busy(&ctx->m2m_ctx->out_q_ctx.q)) {
                mtk_v4l2_vdec_err(ctx, "out_q_ctx buffers already requested");
                ret = -EBUSY;
        }

        /*
         * Setting CAPTURE format after CAPTURE buffers are allocated is
         * invalid.
         */
        if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
            vb2_is_busy(&ctx->m2m_ctx->cap_q_ctx.q)) {
                mtk_v4l2_vdec_err(ctx, "cap_q_ctx buffers already requested");
                ret = -EBUSY;
        }

        fmt = mtk_vdec_find_format(f, dec_pdata);
        if (fmt == NULL) {
                if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                        f->fmt.pix.pixelformat =
                                dec_pdata->default_out_fmt->fourcc;
                        fmt = mtk_vdec_find_format(f, dec_pdata);
                } else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                        f->fmt.pix.pixelformat =
                                dec_pdata->default_cap_fmt->fourcc;
                        fmt = mtk_vdec_find_format(f, dec_pdata);
                }
        }
        if (fmt == NULL)
                return -EINVAL;

        q_data->fmt = fmt;
        vidioc_try_fmt(ctx, f, q_data->fmt);
        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                q_data->sizeimage[0] = pix_mp->plane_fmt[0].sizeimage;
                q_data->coded_width = pix_mp->width;
                q_data->coded_height = pix_mp->height;

                ctx->colorspace = pix_mp->colorspace;
                ctx->ycbcr_enc = pix_mp->ycbcr_enc;
                ctx->quantization = pix_mp->quantization;
                ctx->xfer_func = pix_mp->xfer_func;

                ctx->current_codec = fmt->fourcc;
                if (ctx->state == MTK_STATE_FREE) {
                        ret = vdec_if_init(ctx, q_data->fmt->fourcc);
                        if (ret) {
                                mtk_v4l2_vdec_err(ctx, "[%d]: vdec_if_init() fail ret=%d",
                                                  ctx->id, ret);
                                return -EINVAL;
                        }
                        ctx->state = MTK_STATE_INIT;
                }
        } else {
                ctx->capture_fourcc = fmt->fourcc;
        }

        /*
         * If using the stateless API, S_FMT should have the effect of setting
         * the CAPTURE queue resolution no matter which queue it was called on.
         */
        if (dec_pdata->uses_stateless_api) {
                ctx->picinfo.pic_w = pix_mp->width;
                ctx->picinfo.pic_h = pix_mp->height;

                /*
                 * If get pic info fail, need to use the default pic info params, or
                 * v4l2-compliance will fail
                 */
                ret = vdec_if_get_param(ctx, GET_PARAM_PIC_INFO, &ctx->picinfo);
                if (ret) {
                        mtk_v4l2_vdec_err(ctx, "[%d]Error!! Get GET_PARAM_PICTURE_INFO Fail",
                                          ctx->id);
                }

                ctx->last_decoded_picinfo = ctx->picinfo;

                if (ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes == 1) {
                        ctx->q_data[MTK_Q_DATA_DST].sizeimage[0] =
                                ctx->picinfo.fb_sz[0] +
                                ctx->picinfo.fb_sz[1];
                        ctx->q_data[MTK_Q_DATA_DST].bytesperline[0] =
                                ctx->picinfo.buf_w;
                } else {
                        ctx->q_data[MTK_Q_DATA_DST].sizeimage[0] =
                                ctx->picinfo.fb_sz[0];
                        ctx->q_data[MTK_Q_DATA_DST].bytesperline[0] =
                                ctx->picinfo.buf_w;
                        ctx->q_data[MTK_Q_DATA_DST].sizeimage[1] =
                                ctx->picinfo.fb_sz[1];
                        ctx->q_data[MTK_Q_DATA_DST].bytesperline[1] =
                                ctx->picinfo.buf_w;
                }

                ctx->q_data[MTK_Q_DATA_DST].coded_width = ctx->picinfo.buf_w;
                ctx->q_data[MTK_Q_DATA_DST].coded_height = ctx->picinfo.buf_h;
                mtk_v4l2_vdec_dbg(2, ctx,
                                  "[%d] init() plane:%d wxh=%dx%d pic wxh=%dx%d sz=0x%x_0x%x",
                                  ctx->id, pix_mp->num_planes,
                                  ctx->picinfo.buf_w, ctx->picinfo.buf_h,
                                  ctx->picinfo.pic_w, ctx->picinfo.pic_h,
                                  ctx->q_data[MTK_Q_DATA_DST].sizeimage[0],
                                  ctx->q_data[MTK_Q_DATA_DST].sizeimage[1]);
        }
        return 0;
}

static int vidioc_enum_framesizes(struct file *file, void *priv,
                                struct v4l2_frmsizeenum *fsize)
{
        int i = 0;
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;

        if (fsize->index != 0)
                return -EINVAL;

        for (i = 0; i < *dec_pdata->num_formats; i++) {
                if (fsize->pixel_format != dec_pdata->vdec_formats[i].fourcc)
                        continue;

                /* Only coded formats have frame sizes set */
                if (!dec_pdata->vdec_formats[i].frmsize.max_width)
                        return -ENOTTY;

                fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
                fsize->stepwise = dec_pdata->vdec_formats[i].frmsize;

                mtk_v4l2_vdec_dbg(1, ctx, "%x, %d %d %d %d %d %d",
                                  ctx->dev->dec_capability, fsize->stepwise.min_width,
                                  fsize->stepwise.max_width, fsize->stepwise.step_width,
                                  fsize->stepwise.min_height, fsize->stepwise.max_height,
                                  fsize->stepwise.step_height);

                return 0;
        }

        return -EINVAL;
}

static int vidioc_enum_fmt(struct file *file, struct v4l2_fmtdesc *f,
                           bool output_queue)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        const struct mtk_vcodec_dec_pdata *dec_pdata = ctx->dev->vdec_pdata;
        const struct mtk_video_fmt *fmt;
        int i, j = 0;

        for (i = 0; i < *dec_pdata->num_formats; i++) {
                if (output_queue &&
                    dec_pdata->vdec_formats[i].type != MTK_FMT_DEC)
                        continue;
                if (!output_queue &&
                    dec_pdata->vdec_formats[i].type != MTK_FMT_FRAME)
                        continue;

                if (!output_queue && !mtk_vdec_get_cap_fmt(ctx, i))
                        continue;

                if (j == f->index)
                        break;
                ++j;
        }

        if (i == *dec_pdata->num_formats)
                return -EINVAL;

        fmt = &dec_pdata->vdec_formats[i];
        f->pixelformat = fmt->fourcc;
        f->flags = fmt->flags;

        return 0;
}

static int vidioc_vdec_enum_fmt_vid_cap(struct file *file, void *priv,
                                        struct v4l2_fmtdesc *f)
{
        return vidioc_enum_fmt(file, f, false);
}

static int vidioc_vdec_enum_fmt_vid_out(struct file *file, void *priv,
                                        struct v4l2_fmtdesc *f)
{
        return vidioc_enum_fmt(file, f, true);
}

static int vidioc_vdec_g_fmt(struct file *file, void *priv,
                             struct v4l2_format *f)
{
        struct mtk_vcodec_dec_ctx *ctx = file_to_dec_ctx(file);
        struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
        struct mtk_q_data *q_data;

        q_data = mtk_vdec_get_q_data(ctx, f->type);

        pix_mp->field = V4L2_FIELD_NONE;
        pix_mp->colorspace = ctx->colorspace;
        pix_mp->ycbcr_enc = ctx->ycbcr_enc;
        pix_mp->quantization = ctx->quantization;
        pix_mp->xfer_func = ctx->xfer_func;

        if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
            (ctx->state >= MTK_STATE_HEADER)) {
                /* Until STREAMOFF is called on the CAPTURE queue
                 * (acknowledging the event), the driver operates as if
                 * the resolution hasn't changed yet.
                 * So we just return picinfo yet, and update picinfo in
                 * stop_streaming hook function
                 */
                q_data->sizeimage[0] = ctx->picinfo.fb_sz[0];
                q_data->sizeimage[1] = ctx->picinfo.fb_sz[1];
                q_data->bytesperline[0] = ctx->last_decoded_picinfo.buf_w;
                q_data->bytesperline[1] = ctx->last_decoded_picinfo.buf_w;
                q_data->coded_width = ctx->picinfo.buf_w;
                q_data->coded_height = ctx->picinfo.buf_h;
                ctx->last_decoded_picinfo.cap_fourcc = q_data->fmt->fourcc;

                /*
                 * Width and height are set to the dimensions
                 * of the movie, the buffer is bigger and
                 * further processing stages should crop to this
                 * rectangle.
                 */
                pix_mp->width = q_data->coded_width;
                pix_mp->height = q_data->coded_height;

                /*
                 * Set pixelformat to the format in which mt vcodec
                 * outputs the decoded frame
                 */
                pix_mp->num_planes = q_data->fmt->num_planes;
                pix_mp->pixelformat = q_data->fmt->fourcc;
                pix_mp->plane_fmt[0].bytesperline = q_data->bytesperline[0];
                pix_mp->plane_fmt[0].sizeimage = q_data->sizeimage[0];
                pix_mp->plane_fmt[1].bytesperline = q_data->bytesperline[1];
                pix_mp->plane_fmt[1].sizeimage = q_data->sizeimage[1];

        } else if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                /*
                 * This is run on OUTPUT
                 * The buffer contains compressed image
                 * so width and height have no meaning.
                 * Assign value here to pass v4l2-compliance test
                 */
                pix_mp->width = q_data->visible_width;
                pix_mp->height = q_data->visible_height;
                pix_mp->plane_fmt[0].bytesperline = q_data->bytesperline[0];
                pix_mp->plane_fmt[0].sizeimage = q_data->sizeimage[0];
                pix_mp->pixelformat = q_data->fmt->fourcc;
                pix_mp->num_planes = q_data->fmt->num_planes;
        } else {
                pix_mp->width = q_data->coded_width;
                pix_mp->height = q_data->coded_height;
                pix_mp->num_planes = q_data->fmt->num_planes;
                pix_mp->pixelformat = q_data->fmt->fourcc;
                pix_mp->plane_fmt[0].bytesperline = q_data->bytesperline[0];
                pix_mp->plane_fmt[0].sizeimage = q_data->sizeimage[0];
                pix_mp->plane_fmt[1].bytesperline = q_data->bytesperline[1];
                pix_mp->plane_fmt[1].sizeimage = q_data->sizeimage[1];

                mtk_v4l2_vdec_dbg(1, ctx, "[%d] type=%d state=%d Format information not ready!",
                                  ctx->id, f->type, ctx->state);
        }

        return 0;
}

int vb2ops_vdec_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
                            unsigned int *nplanes, unsigned int sizes[],
                            struct device *alloc_devs[])
{
        struct mtk_vcodec_dec_ctx *ctx = vb2_get_drv_priv(vq);
        struct mtk_q_data *q_data;
        unsigned int i;

        q_data = mtk_vdec_get_q_data(ctx, vq->type);

        if (q_data == NULL) {
                mtk_v4l2_vdec_err(ctx, "vq->type=%d err\n", vq->type);
                return -EINVAL;
        }

        if (*nplanes) {
                if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                        if (*nplanes != q_data->fmt->num_planes)
                                return -EINVAL;
                } else {
                        if (*nplanes != 1)
                                return -EINVAL;
                }
                for (i = 0; i < *nplanes; i++) {
                        if (sizes[i] < q_data->sizeimage[i])
                                return -EINVAL;
                }
        } else {
                if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
                        *nplanes = q_data->fmt->num_planes;
                else
                        *nplanes = 1;

                for (i = 0; i < *nplanes; i++)
                        sizes[i] = q_data->sizeimage[i];
        }

        mtk_v4l2_vdec_dbg(1, ctx,
                          "[%d]\t type = %d, get %d plane(s), %d buffer(s) of size 0x%x 0x%x ",
                          ctx->id, vq->type, *nplanes, *nbuffers, sizes[0], sizes[1]);

        return 0;
}

int vb2ops_vdec_buf_prepare(struct vb2_buffer *vb)
{
        struct mtk_vcodec_dec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct mtk_q_data *q_data;
        int i;

        mtk_v4l2_vdec_dbg(3, ctx, "[%d] (%d) id=%d",
                          ctx->id, vb->vb2_queue->type, vb->index);

        q_data = mtk_vdec_get_q_data(ctx, vb->vb2_queue->type);

        for (i = 0; i < q_data->fmt->num_planes; i++) {
                if (vb2_plane_size(vb, i) < q_data->sizeimage[i]) {
                        mtk_v4l2_vdec_err(ctx, "data will not fit into plane %d (%lu < %d)",
                                          i, vb2_plane_size(vb, i), q_data->sizeimage[i]);
                        return -EINVAL;
                }
                if (!V4L2_TYPE_IS_OUTPUT(vb->type))
                        vb2_set_plane_payload(vb, i, q_data->sizeimage[i]);
        }

        return 0;
}

void vb2ops_vdec_buf_finish(struct vb2_buffer *vb)
{
        struct mtk_vcodec_dec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct vb2_v4l2_buffer *vb2_v4l2;
        struct mtk_video_dec_buf *buf;
        bool buf_error;

        vb2_v4l2 = container_of(vb, struct vb2_v4l2_buffer, vb2_buf);
        buf = container_of(vb2_v4l2, struct mtk_video_dec_buf, m2m_buf.vb);
        mutex_lock(&ctx->lock);
        if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                buf->queued_in_v4l2 = false;
                buf->queued_in_vb2 = false;
        }
        buf_error = buf->error;
        mutex_unlock(&ctx->lock);

        if (buf_error) {
                mtk_v4l2_vdec_err(ctx, "Unrecoverable error on buffer.");
                ctx->state = MTK_STATE_ABORT;
        }
}

int vb2ops_vdec_buf_init(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vb2_v4l2 = container_of(vb,
                                        struct vb2_v4l2_buffer, vb2_buf);
        struct mtk_video_dec_buf *buf = container_of(vb2_v4l2,
                                        struct mtk_video_dec_buf, m2m_buf.vb);

        if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                buf->used = false;
                buf->queued_in_v4l2 = false;
        }

        return 0;
}

int vb2ops_vdec_start_streaming(struct vb2_queue *q, unsigned int count)
{
        struct mtk_vcodec_dec_ctx *ctx = vb2_get_drv_priv(q);

        if (ctx->state == MTK_STATE_FLUSH)
                ctx->state = MTK_STATE_HEADER;

        return 0;
}

void vb2ops_vdec_stop_streaming(struct vb2_queue *q)
{
        struct vb2_v4l2_buffer *src_buf = NULL, *dst_buf = NULL;
        struct mtk_vcodec_dec_ctx *ctx = vb2_get_drv_priv(q);
        int ret;

        mtk_v4l2_vdec_dbg(3, ctx, "[%d] (%d) state=(%x) ctx->decoded_frame_cnt=%d",
                          ctx->id, q->type, ctx->state, ctx->decoded_frame_cnt);

        if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                while ((src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx))) {
                        if (src_buf != &ctx->empty_flush_buf.vb) {
                                struct media_request *req =
                                        src_buf->vb2_buf.req_obj.req;
                                v4l2_m2m_buf_done(src_buf,
                                                VB2_BUF_STATE_ERROR);
                                if (req) {
                                        v4l2_ctrl_request_complete(req, &ctx->ctrl_hdl);
                                        media_request_manual_complete(req);
                                }
                        }
                }
                return;
        }

        if (ctx->state >= MTK_STATE_HEADER) {

                /* Until STREAMOFF is called on the CAPTURE queue
                 * (acknowledging the event), the driver operates
                 * as if the resolution hasn't changed yet, i.e.
                 * VIDIOC_G_FMT< etc. return previous resolution.
                 * So we update picinfo here
                 */
                ctx->picinfo = ctx->last_decoded_picinfo;

                mtk_v4l2_vdec_dbg(2, ctx,
                                  "[%d]-> new(%d,%d), old(%d,%d), real(%d,%d)",
                                  ctx->id, ctx->last_decoded_picinfo.pic_w,
                                  ctx->last_decoded_picinfo.pic_h,
                                  ctx->picinfo.pic_w, ctx->picinfo.pic_h,
                                  ctx->last_decoded_picinfo.buf_w,
                                  ctx->last_decoded_picinfo.buf_h);

                ret = ctx->dev->vdec_pdata->flush_decoder(ctx);
                if (ret)
                        mtk_v4l2_vdec_err(ctx, "DecodeFinal failed, ret=%d", ret);
        }
        ctx->state = MTK_STATE_FLUSH;

        while ((dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx))) {
                vb2_set_plane_payload(&dst_buf->vb2_buf, 0, 0);
                if (ctx->q_data[MTK_Q_DATA_DST].fmt->num_planes == 2)
                        vb2_set_plane_payload(&dst_buf->vb2_buf, 1, 0);
                v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
        }

}

static void m2mops_vdec_device_run(void *priv)
{
        struct mtk_vcodec_dec_ctx *ctx = priv;
        struct mtk_vcodec_dec_dev *dev = ctx->dev;

        queue_work(dev->decode_workqueue, &ctx->decode_work);
}

static int m2mops_vdec_job_ready(void *m2m_priv)
{
        struct mtk_vcodec_dec_ctx *ctx = m2m_priv;

        mtk_v4l2_vdec_dbg(3, ctx, "[%d]", ctx->id);

        if (ctx->state == MTK_STATE_ABORT)
                return 0;

        if ((ctx->last_decoded_picinfo.pic_w != ctx->picinfo.pic_w) ||
            (ctx->last_decoded_picinfo.pic_h != ctx->picinfo.pic_h))
                return 0;

        if (ctx->state != MTK_STATE_HEADER)
                return 0;

        return 1;
}

static void m2mops_vdec_job_abort(void *priv)
{
        struct mtk_vcodec_dec_ctx *ctx = priv;

        ctx->state = MTK_STATE_ABORT;
}

const struct v4l2_m2m_ops mtk_vdec_m2m_ops = {
        .device_run     = m2mops_vdec_device_run,
        .job_ready      = m2mops_vdec_job_ready,
        .job_abort      = m2mops_vdec_job_abort,
};

const struct v4l2_ioctl_ops mtk_vdec_ioctl_ops = {
        .vidioc_streamon        = v4l2_m2m_ioctl_streamon,
        .vidioc_streamoff       = v4l2_m2m_ioctl_streamoff,
        .vidioc_reqbufs         = v4l2_m2m_ioctl_reqbufs,
        .vidioc_querybuf        = v4l2_m2m_ioctl_querybuf,
        .vidioc_expbuf          = v4l2_m2m_ioctl_expbuf,

        .vidioc_qbuf            = vidioc_vdec_qbuf,
        .vidioc_dqbuf           = vidioc_vdec_dqbuf,

        .vidioc_try_fmt_vid_cap_mplane  = vidioc_try_fmt_vid_cap_mplane,
        .vidioc_try_fmt_vid_out_mplane  = vidioc_try_fmt_vid_out_mplane,

        .vidioc_s_fmt_vid_cap_mplane    = vidioc_vdec_s_fmt,
        .vidioc_s_fmt_vid_out_mplane    = vidioc_vdec_s_fmt,
        .vidioc_g_fmt_vid_cap_mplane    = vidioc_vdec_g_fmt,
        .vidioc_g_fmt_vid_out_mplane    = vidioc_vdec_g_fmt,

        .vidioc_create_bufs             = v4l2_m2m_ioctl_create_bufs,

        .vidioc_enum_fmt_vid_cap        = vidioc_vdec_enum_fmt_vid_cap,
        .vidioc_enum_fmt_vid_out        = vidioc_vdec_enum_fmt_vid_out,
        .vidioc_enum_framesizes = vidioc_enum_framesizes,

        .vidioc_querycap                = vidioc_vdec_querycap,
        .vidioc_subscribe_event         = vidioc_vdec_subscribe_evt,
        .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
        .vidioc_g_selection             = vidioc_vdec_g_selection,
        .vidioc_s_selection             = vidioc_vdec_s_selection,

        .vidioc_decoder_cmd = vidioc_decoder_cmd,
        .vidioc_try_decoder_cmd = vidioc_try_decoder_cmd,
};

int mtk_vcodec_dec_queue_init(void *priv, struct vb2_queue *src_vq,
                           struct vb2_queue *dst_vq)
{
        struct mtk_vcodec_dec_ctx *ctx = priv;
        int ret = 0;

        mtk_v4l2_vdec_dbg(3, ctx, "[%d]", ctx->id);

        src_vq->type            = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
        src_vq->io_modes        = VB2_DMABUF | VB2_MMAP;
        src_vq->drv_priv        = ctx;
        src_vq->buf_struct_size = sizeof(struct mtk_video_dec_buf);
        src_vq->ops             = ctx->dev->vdec_pdata->vdec_vb2_ops;
        src_vq->mem_ops         = &vb2_dma_contig_memops;
        src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
        src_vq->lock            = &ctx->dev->dev_mutex;
        src_vq->dev             = &ctx->dev->plat_dev->dev;
        src_vq->allow_cache_hints = 1;

        ret = vb2_queue_init(src_vq);
        if (ret) {
                mtk_v4l2_vdec_err(ctx, "Failed to initialize videobuf2 queue(output)");
                return ret;
        }
        dst_vq->type            = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
        dst_vq->io_modes        = VB2_DMABUF | VB2_MMAP;
        dst_vq->drv_priv        = ctx;
        dst_vq->buf_struct_size = sizeof(struct mtk_video_dec_buf);
        dst_vq->ops             = ctx->dev->vdec_pdata->vdec_vb2_ops;
        dst_vq->mem_ops         = &vb2_dma_contig_memops;
        dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
        dst_vq->lock            = &ctx->dev->dev_mutex;
        dst_vq->dev             = &ctx->dev->plat_dev->dev;
        dst_vq->allow_cache_hints = 1;

        ret = vb2_queue_init(dst_vq);
        if (ret)
                mtk_v4l2_vdec_err(ctx, "Failed to initialize videobuf2 queue(capture)");

        return ret;
}