/*
 * Copyright (c) 2016 MediaTek Inc.
 * Author: PC Chen <pc.chen@mediatek.com>
 *         Tiffany Lin <tiffany.lin@mediatek.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

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

#include "mtk_vcodec_drv.h"
#include "mtk_vcodec_dec.h"
#include "mtk_vcodec_intr.h"
#include "mtk_vcodec_util.h"
#include "vdec_drv_if.h"
#include "mtk_vcodec_dec_pm.h"

#define OUT_FMT_IDX     0
#define CAP_FMT_IDX     3

#define MTK_VDEC_MIN_W  64U
#define MTK_VDEC_MIN_H  64U
#define DFT_CFG_WIDTH   MTK_VDEC_MIN_W
#define DFT_CFG_HEIGHT  MTK_VDEC_MIN_H

static struct mtk_video_fmt mtk_video_formats[] = {
        {
                .fourcc = V4L2_PIX_FMT_H264,
                .type = MTK_FMT_DEC,
                .num_planes = 1,
        },
        {
                .fourcc = V4L2_PIX_FMT_VP8,
                .type = MTK_FMT_DEC,
                .num_planes = 1,
        },
        {
                .fourcc = V4L2_PIX_FMT_VP9,
                .type = MTK_FMT_DEC,
                .num_planes = 1,
        },
        {
                .fourcc = V4L2_PIX_FMT_MT21C,
                .type = MTK_FMT_FRAME,
                .num_planes = 2,
        },
};

static const struct mtk_codec_framesizes mtk_vdec_framesizes[] = {
        {
                .fourcc = V4L2_PIX_FMT_H264,
                .stepwise = {  MTK_VDEC_MIN_W, MTK_VDEC_MAX_W, 16,
                                MTK_VDEC_MIN_H, MTK_VDEC_MAX_H, 16 },
        },
        {
                .fourcc = V4L2_PIX_FMT_VP8,
                .stepwise = {  MTK_VDEC_MIN_W, MTK_VDEC_MAX_W, 16,
                                MTK_VDEC_MIN_H, MTK_VDEC_MAX_H, 16 },
        },
        {
                .fourcc = V4L2_PIX_FMT_VP9,
                .stepwise = {  MTK_VDEC_MIN_W, MTK_VDEC_MAX_W, 16,
                                MTK_VDEC_MIN_H, MTK_VDEC_MAX_H, 16 },
        },
};

#define NUM_SUPPORTED_FRAMESIZE ARRAY_SIZE(mtk_vdec_framesizes)
#define NUM_FORMATS ARRAY_SIZE(mtk_video_formats)

static struct mtk_video_fmt *mtk_vdec_find_format(struct v4l2_format *f)
{
        struct mtk_video_fmt *fmt;
        unsigned int k;

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

        return NULL;
}

static struct mtk_q_data *mtk_vdec_get_q_data(struct mtk_vcodec_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];
}

/*
 * This function tries to clean all display buffers, the buffers will return
 * in display order.
 * Note the buffers returned from codec driver may still be in driver's
 * reference list.
 */
static struct vb2_buffer *get_display_buffer(struct mtk_vcodec_ctx *ctx)
{
        struct vdec_fb *disp_frame_buffer = NULL;
        struct mtk_video_dec_buf *dstbuf;

        mtk_v4l2_debug(3, "[%d]", ctx->id);
        if (vdec_if_get_param(ctx,
                        GET_PARAM_DISP_FRAME_BUFFER,
                        &disp_frame_buffer)) {
                mtk_v4l2_err("[%d]Cannot get param : GET_PARAM_DISP_FRAME_BUFFER",
                        ctx->id);
                return NULL;
        }

        if (disp_frame_buffer == NULL) {
                mtk_v4l2_debug(3, "No display frame buffer");
                return NULL;
        }

        dstbuf = container_of(disp_frame_buffer, struct mtk_video_dec_buf,
                                frame_buffer);
        mutex_lock(&ctx->lock);
        if (dstbuf->used) {
                vb2_set_plane_payload(&dstbuf->vb.vb2_buf, 0,
                                        ctx->picinfo.y_bs_sz);
                vb2_set_plane_payload(&dstbuf->vb.vb2_buf, 1,
                                        ctx->picinfo.c_bs_sz);

                dstbuf->ready_to_display = true;

                mtk_v4l2_debug(2,
                                "[%d]status=%x queue id=%d to done_list %d",
                                ctx->id, disp_frame_buffer->status,
                                dstbuf->vb.vb2_buf.index,
                                dstbuf->queued_in_vb2);

                v4l2_m2m_buf_done(&dstbuf->vb, VB2_BUF_STATE_DONE);
                ctx->decoded_frame_cnt++;
        }
        mutex_unlock(&ctx->lock);
        return &dstbuf->vb.vb2_buf;
}

/*
 * This function tries to clean all capture buffers that are not used as
 * reference buffers by codec driver any more
 * In this case, we need re-queue buffer to vb2 buffer if user space
 * already returns this buffer to v4l2 or this buffer is just the output of
 * previous sps/pps/resolution change decode, or do nothing if user
 * space still owns this buffer
 */
static struct vb2_buffer *get_free_buffer(struct mtk_vcodec_ctx *ctx)
{
        struct mtk_video_dec_buf *dstbuf;
        struct vdec_fb *free_frame_buffer = NULL;

        if (vdec_if_get_param(ctx,
                                GET_PARAM_FREE_FRAME_BUFFER,
                                &free_frame_buffer)) {
                mtk_v4l2_err("[%d] Error!! Cannot get param", ctx->id);
                return NULL;
        }
        if (free_frame_buffer == NULL) {
                mtk_v4l2_debug(3, " No free frame buffer");
                return NULL;
        }

        mtk_v4l2_debug(3, "[%d] tmp_frame_addr = 0x%p",
                        ctx->id, free_frame_buffer);

        dstbuf = container_of(free_frame_buffer, struct mtk_video_dec_buf,
                                frame_buffer);

        mutex_lock(&ctx->lock);
        if (dstbuf->used) {
                if ((dstbuf->queued_in_vb2) &&
                    (dstbuf->queued_in_v4l2) &&
                    (free_frame_buffer->status == FB_ST_FREE)) {
                        /*
                         * After decode sps/pps or non-display buffer, we don't
                         * need to return capture buffer to user space, but
                         * just re-queue this capture buffer to vb2 queue.
                         * This reduce overheads that dq/q unused capture
                         * buffer. In this case, queued_in_vb2 = true.
                         */
                        mtk_v4l2_debug(2,
                                "[%d]status=%x queue id=%d to rdy_queue %d",
                                ctx->id, free_frame_buffer->status,
                                dstbuf->vb.vb2_buf.index,
                                dstbuf->queued_in_vb2);
                        v4l2_m2m_buf_queue(ctx->m2m_ctx, &dstbuf->vb);
                } else if ((dstbuf->queued_in_vb2 == false) &&
                           (dstbuf->queued_in_v4l2 == true)) {
                        /*
                         * If buffer in v4l2 driver but not in vb2 queue yet,
                         * and we get this buffer from free_list, it means
                         * that codec driver do not use this buffer as
                         * reference buffer anymore. We should q buffer to vb2
                         * queue, so later work thread could get this buffer
                         * for decode. In this case, queued_in_vb2 = false
                         * means this buffer is not from previous decode
                         * output.
                         */
                        mtk_v4l2_debug(2,
                                        "[%d]status=%x queue id=%d to rdy_queue",
                                        ctx->id, free_frame_buffer->status,
                                        dstbuf->vb.vb2_buf.index);
                        v4l2_m2m_buf_queue(ctx->m2m_ctx, &dstbuf->vb);
                        dstbuf->queued_in_vb2 = true;
                } else {
                        /*
                         * Codec driver do not need to reference this capture
                         * buffer and this buffer is not in v4l2 driver.
                         * Then we don't need to do any thing, just add log when
                         * we need to debug buffer flow.
                         * When this buffer q from user space, it could
                         * directly q to vb2 buffer
                         */
                        mtk_v4l2_debug(3, "[%d]status=%x err queue id=%d %d %d",
                                        ctx->id, free_frame_buffer->status,
                                        dstbuf->vb.vb2_buf.index,
                                        dstbuf->queued_in_vb2,
                                        dstbuf->queued_in_v4l2);
                }
                dstbuf->used = false;
        }
        mutex_unlock(&ctx->lock);
        return &dstbuf->vb.vb2_buf;
}

static void clean_display_buffer(struct mtk_vcodec_ctx *ctx)
{
        struct vb2_buffer *framptr;

        do {
                framptr = get_display_buffer(ctx);
        } while (framptr);
}

static void clean_free_buffer(struct mtk_vcodec_ctx *ctx)
{
        struct vb2_buffer *framptr;

        do {
                framptr = get_free_buffer(ctx);
        } while (framptr);
}

static void mtk_vdec_queue_res_chg_event(struct mtk_vcodec_ctx *ctx)
{
        static const struct v4l2_event ev_src_ch = {
                .type = V4L2_EVENT_SOURCE_CHANGE,
                .u.src_change.changes =
                V4L2_EVENT_SRC_CH_RESOLUTION,
        };

        mtk_v4l2_debug(1, "[%d]", ctx->id);
        v4l2_event_queue_fh(&ctx->fh, &ev_src_ch);
}

static void mtk_vdec_flush_decoder(struct mtk_vcodec_ctx *ctx)
{
        bool res_chg;
        int ret = 0;

        ret = vdec_if_decode(ctx, NULL, NULL, &res_chg);
        if (ret)
                mtk_v4l2_err("DecodeFinal failed, ret=%d", ret);

        clean_display_buffer(ctx);
        clean_free_buffer(ctx);
}

static int mtk_vdec_pic_info_update(struct mtk_vcodec_ctx *ctx)
{
        unsigned int dpbsize = 0;
        int ret;

        if (vdec_if_get_param(ctx,
                                GET_PARAM_PIC_INFO,
                                &ctx->last_decoded_picinfo)) {
                mtk_v4l2_err("[%d]Error!! Cannot get param : GET_PARAM_PICTURE_INFO ERR",
                                ctx->id);
                return -EINVAL;
        }

        if (ctx->last_decoded_picinfo.pic_w == 0 ||
                ctx->last_decoded_picinfo.pic_h == 0 ||
                ctx->last_decoded_picinfo.buf_w == 0 ||
                ctx->last_decoded_picinfo.buf_h == 0) {
                mtk_v4l2_err("Cannot get correct pic info");
                return -EINVAL;
        }

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

        mtk_v4l2_debug(1,
                        "[%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 = vdec_if_get_param(ctx, GET_PARAM_DPB_SIZE, &dpbsize);
        if (dpbsize == 0)
                mtk_v4l2_err("Incorrect dpb size, ret=%d", ret);

        ctx->dpb_size = dpbsize;

        return ret;
}

static void mtk_vdec_worker(struct work_struct *work)
{
        struct mtk_vcodec_ctx *ctx = container_of(work, struct mtk_vcodec_ctx,
                                decode_work);
        struct mtk_vcodec_dev *dev = ctx->dev;
        struct vb2_buffer *src_buf, *dst_buf;
        struct mtk_vcodec_mem buf;
        struct vdec_fb *pfb;
        bool res_chg = false;
        int ret;
        struct mtk_video_dec_buf *dst_buf_info, *src_buf_info;
        struct vb2_v4l2_buffer *dst_vb2_v4l2, *src_vb2_v4l2;

        src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
        if (src_buf == NULL) {
                v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
                mtk_v4l2_debug(1, "[%d] src_buf empty!!", ctx->id);
                return;
        }

        dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
        if (dst_buf == NULL) {
                v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
                mtk_v4l2_debug(1, "[%d] dst_buf empty!!", ctx->id);
                return;
        }

        src_vb2_v4l2 = container_of(src_buf, struct vb2_v4l2_buffer, vb2_buf);
        src_buf_info = container_of(src_vb2_v4l2, struct mtk_video_dec_buf, vb);

        dst_vb2_v4l2 = container_of(dst_buf, struct vb2_v4l2_buffer, vb2_buf);
        dst_buf_info = container_of(dst_vb2_v4l2, struct mtk_video_dec_buf, vb);

        pfb = &dst_buf_info->frame_buffer;
        pfb->base_y.va = vb2_plane_vaddr(dst_buf, 0);
        pfb->base_y.dma_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
        pfb->base_y.size = ctx->picinfo.y_bs_sz + ctx->picinfo.y_len_sz;

        pfb->base_c.va = vb2_plane_vaddr(dst_buf, 1);
        pfb->base_c.dma_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 1);
        pfb->base_c.size = ctx->picinfo.c_bs_sz + ctx->picinfo.c_len_sz;
        pfb->status = 0;
        mtk_v4l2_debug(3, "===>[%d] vdec_if_decode() ===>", ctx->id);

        mtk_v4l2_debug(3,
                        "id=%d Framebuf  pfb=%p VA=%p Y_DMA=%pad C_DMA=%pad Size=%zx",
                        dst_buf->index, pfb,
                        pfb->base_y.va, &pfb->base_y.dma_addr,
                        &pfb->base_c.dma_addr, pfb->base_y.size);

        if (src_buf_info->lastframe) {
                mtk_v4l2_debug(1, "Got empty flush input buffer.");
                src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);

                /* update dst buf status */
                dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
                mutex_lock(&ctx->lock);
                dst_buf_info->used = false;
                mutex_unlock(&ctx->lock);

                vdec_if_decode(ctx, NULL, NULL, &res_chg);
                clean_display_buffer(ctx);
                vb2_set_plane_payload(&dst_buf_info->vb.vb2_buf, 0, 0);
                vb2_set_plane_payload(&dst_buf_info->vb.vb2_buf, 1, 0);
                dst_vb2_v4l2->flags |= V4L2_BUF_FLAG_LAST;
                v4l2_m2m_buf_done(&dst_buf_info->vb, VB2_BUF_STATE_DONE);
                clean_free_buffer(ctx);
                v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
                return;
        }
        buf.va = vb2_plane_vaddr(src_buf, 0);
        buf.dma_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
        buf.size = (size_t)src_buf->planes[0].bytesused;
        if (!buf.va) {
                v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
                mtk_v4l2_err("[%d] id=%d src_addr is NULL!!",
                                ctx->id, src_buf->index);
                return;
        }
        mtk_v4l2_debug(3, "[%d] Bitstream VA=%p DMA=%pad Size=%zx vb=%p",
                        ctx->id, buf.va, &buf.dma_addr, buf.size, src_buf);
        dst_buf_info->vb.vb2_buf.timestamp
                        = src_buf_info->vb.vb2_buf.timestamp;
        dst_buf_info->vb.timecode
                        = src_buf_info->vb.timecode;
        mutex_lock(&ctx->lock);
        dst_buf_info->used = true;
        mutex_unlock(&ctx->lock);
        src_buf_info->used = true;

        ret = vdec_if_decode(ctx, &buf, pfb, &res_chg);

        if (ret) {
                mtk_v4l2_err(
                        " <===[%d], src_buf[%d] sz=0x%zx pts=%llu dst_buf[%d] vdec_if_decode() ret=%d res_chg=%d===>",
                        ctx->id,
                        src_buf->index,
                        buf.size,
                        src_buf_info->vb.vb2_buf.timestamp,
                        dst_buf->index,
                        ret, res_chg);
                src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
                if (ret == -EIO) {
                        mutex_lock(&ctx->lock);
                        src_buf_info->error = true;
                        mutex_unlock(&ctx->lock);
                }
                v4l2_m2m_buf_done(&src_buf_info->vb, VB2_BUF_STATE_ERROR);
        } else if (res_chg == false) {
                /*
                 * we only return src buffer with VB2_BUF_STATE_DONE
                 * when decode success without resolution change
                 */
                src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
                v4l2_m2m_buf_done(&src_buf_info->vb, VB2_BUF_STATE_DONE);
        }

        dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
        clean_display_buffer(ctx);
        clean_free_buffer(ctx);

        if (!ret && res_chg) {
                mtk_vdec_pic_info_update(ctx);
                /*
                 * On encountering a resolution change in the stream.
                 * The driver must first process and decode all
                 * remaining buffers from before the resolution change
                 * point, so call flush decode here
                 */
                mtk_vdec_flush_decoder(ctx);
                /*
                 * After all buffers containing decoded frames from
                 * before the resolution change point ready to be
                 * dequeued on the CAPTURE queue, the driver sends a
                 * V4L2_EVENT_SOURCE_CHANGE event for source change
                 * type V4L2_EVENT_SRC_CH_RESOLUTION
                 */
                mtk_vdec_queue_res_chg_event(ctx);
        }
        v4l2_m2m_job_finish(dev->m2m_dev_dec, ctx->m2m_ctx);
}

static int vidioc_try_decoder_cmd(struct file *file, void *priv,
                                struct v4l2_decoder_cmd *cmd)
{
        switch (cmd->cmd) {
        case V4L2_DEC_CMD_STOP:
        case V4L2_DEC_CMD_START:
                if (cmd->flags != 0) {
                        mtk_v4l2_err("cmd->flags=%u", cmd->flags);
                        return -EINVAL;
                }
                break;
        default:
                return -EINVAL;
        }
        return 0;
}


static int vidioc_decoder_cmd(struct file *file, void *priv,
                                struct v4l2_decoder_cmd *cmd)
{
        struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);
        struct vb2_queue *src_vq, *dst_vq;
        int ret;

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

        mtk_v4l2_debug(1, "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_debug(1, "Output stream is off. No need to flush.");
                        return 0;
                }
                if (!vb2_is_streaming(dst_vq)) {
                        mtk_v4l2_debug(1, "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;
}

void mtk_vdec_unlock(struct mtk_vcodec_ctx *ctx)
{
        mutex_unlock(&ctx->dev->dec_mutex);
}

void mtk_vdec_lock(struct mtk_vcodec_ctx *ctx)
{
        mutex_lock(&ctx->dev->dec_mutex);
}

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

void mtk_vcodec_dec_set_default_params(struct mtk_vcodec_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, mtk_vdec_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 = &mtk_video_formats[OUT_FMT_IDX];
        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 = &mtk_video_formats[CAP_FMT_IDX];
        q_data->field = V4L2_FIELD_NONE;

        v4l_bound_align_image(&q_data->coded_width,
                                MTK_VDEC_MIN_W,
                                MTK_VDEC_MAX_W, 4,
                                &q_data->coded_height,
                                MTK_VDEC_MIN_H,
                                MTK_VDEC_MAX_H, 5, 6);

        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_ctx *ctx = fh_to_ctx(priv);

        if (ctx->state == MTK_STATE_ABORT) {
                mtk_v4l2_err("[%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_ctx *ctx = fh_to_ctx(priv);

        if (ctx->state == MTK_STATE_ABORT) {
                mtk_v4l2_err("[%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)
{
        strlcpy(cap->driver, MTK_VCODEC_DEC_NAME, sizeof(cap->driver));
        strlcpy(cap->bus_info, MTK_PLATFORM_STR, sizeof(cap->bus_info));
        strlcpy(cap->card, MTK_PLATFORM_STR, sizeof(cap->card));

        return 0;
}

static int vidioc_vdec_subscribe_evt(struct v4l2_fh *fh,
                                     const struct v4l2_event_subscription *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 v4l2_format *f, struct mtk_video_fmt *fmt)
{
        struct v4l2_pix_format_mplane *pix_fmt_mp = &f->fmt.pix_mp;
        int i;

        pix_fmt_mp->field = V4L2_FIELD_NONE;

        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;

                pix_fmt_mp->height = clamp(pix_fmt_mp->height,
                                        MTK_VDEC_MIN_H,
                                        MTK_VDEC_MAX_H);
                pix_fmt_mp->width = clamp(pix_fmt_mp->width,
                                        MTK_VDEC_MIN_W,
                                        MTK_VDEC_MAX_W);

                /*
                 * Find next closer width align 64, heign 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,
                                        MTK_VDEC_MAX_W, 6,
                                        &pix_fmt_mp->height,
                                        MTK_VDEC_MIN_H,
                                        MTK_VDEC_MAX_H, 6, 9);

                if (pix_fmt_mp->width < tmp_w &&
                        (pix_fmt_mp->width + 64) <= MTK_VDEC_MAX_W)
                        pix_fmt_mp->width += 64;
                if (pix_fmt_mp->height < tmp_h &&
                        (pix_fmt_mp->height + 64) <= MTK_VDEC_MAX_H)
                        pix_fmt_mp->height += 64;

                mtk_v4l2_debug(0,
                        "before resize width=%d, height=%d, after resize width=%d, height=%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;
                }
        }

        for (i = 0; i < pix_fmt_mp->num_planes; i++)
                memset(&(pix_fmt_mp->plane_fmt[i].reserved[0]), 0x0,
                           sizeof(pix_fmt_mp->plane_fmt[0].reserved));

        pix_fmt_mp->flags = 0;
        memset(&pix_fmt_mp->reserved, 0x0, sizeof(pix_fmt_mp->reserved));
        return 0;
}

static int vidioc_try_fmt_vid_cap_mplane(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct mtk_video_fmt *fmt;

        fmt = mtk_vdec_find_format(f);
        if (!fmt) {
                f->fmt.pix.pixelformat = mtk_video_formats[CAP_FMT_IDX].fourcc;
                fmt = mtk_vdec_find_format(f);
        }

        return vidioc_try_fmt(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;
        struct mtk_video_fmt *fmt;

        fmt = mtk_vdec_find_format(f);
        if (!fmt) {
                f->fmt.pix.pixelformat = mtk_video_formats[OUT_FMT_IDX].fourcc;
                fmt = mtk_vdec_find_format(f);
        }

        if (pix_fmt_mp->plane_fmt[0].sizeimage == 0) {
                mtk_v4l2_err("sizeimage of output format must be given");
                return -EINVAL;
        }

        return vidioc_try_fmt(f, fmt);
}

static int vidioc_vdec_g_selection(struct file *file, void *priv,
                        struct v4l2_selection *s)
{
        struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);
        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_ctx *ctx = fh_to_ctx(priv);

        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_ctx *ctx = fh_to_ctx(priv);
        struct v4l2_pix_format_mplane *pix_mp;
        struct mtk_q_data *q_data;
        int ret = 0;
        struct mtk_video_fmt *fmt;

        mtk_v4l2_debug(3, "[%d]", ctx->id);

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

        pix_mp = &f->fmt.pix_mp;
        if ((f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) &&
            vb2_is_busy(&ctx->m2m_ctx->out_q_ctx.q)) {
                mtk_v4l2_err("out_q_ctx buffers already requested");
                ret = -EBUSY;
        }

        if ((f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
            vb2_is_busy(&ctx->m2m_ctx->cap_q_ctx.q)) {
                mtk_v4l2_err("cap_q_ctx buffers already requested");
                ret = -EBUSY;
        }

        fmt = mtk_vdec_find_format(f);
        if (fmt == NULL) {
                if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                        f->fmt.pix.pixelformat =
                                mtk_video_formats[OUT_FMT_IDX].fourcc;
                        fmt = mtk_vdec_find_format(f);
                } else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
                        f->fmt.pix.pixelformat =
                                mtk_video_formats[CAP_FMT_IDX].fourcc;
                        fmt = mtk_vdec_find_format(f);
                }
        }

        q_data->fmt = fmt;
        vidioc_try_fmt(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 = f->fmt.pix_mp.colorspace;
                ctx->ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
                ctx->quantization = f->fmt.pix_mp.quantization;
                ctx->xfer_func = f->fmt.pix_mp.xfer_func;

                if (ctx->state == MTK_STATE_FREE) {
                        ret = vdec_if_init(ctx, q_data->fmt->fourcc);
                        if (ret) {
                                mtk_v4l2_err("[%d]: vdec_if_init() fail ret=%d",
                                        ctx->id, ret);
                                return -EINVAL;
                        }
                        ctx->state = MTK_STATE_INIT;
                }
        }

        return 0;
}

static int vidioc_enum_framesizes(struct file *file, void *priv,
                                struct v4l2_frmsizeenum *fsize)
{
        int i = 0;
        struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);

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

        for (i = 0; i < NUM_SUPPORTED_FRAMESIZE; ++i) {
                if (fsize->pixel_format != mtk_vdec_framesizes[i].fourcc)
                        continue;

                fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
                fsize->stepwise = mtk_vdec_framesizes[i].stepwise;
                if (!(ctx->dev->dec_capability &
                                VCODEC_CAPABILITY_4K_DISABLED)) {
                        mtk_v4l2_debug(3, "4K is enabled");
                        fsize->stepwise.max_width =
                                        VCODEC_DEC_4K_CODED_WIDTH;
                        fsize->stepwise.max_height =
                                        VCODEC_DEC_4K_CODED_HEIGHT;
                }
                mtk_v4l2_debug(1, "%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 v4l2_fmtdesc *f, bool output_queue)
{
        struct mtk_video_fmt *fmt;
        int i, j = 0;

        for (i = 0; i < NUM_FORMATS; i++) {
                if (output_queue && (mtk_video_formats[i].type != MTK_FMT_DEC))
                        continue;
                if (!output_queue &&
                        (mtk_video_formats[i].type != MTK_FMT_FRAME))
                        continue;

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

        if (i == NUM_FORMATS)
                return -EINVAL;

        fmt = &mtk_video_formats[i];
        f->pixelformat = fmt->fourcc;

        return 0;
}

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

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

static int vidioc_vdec_g_fmt(struct file *file, void *priv,
                             struct v4l2_format *f)
{
        struct mtk_vcodec_ctx *ctx = fh_to_ctx(priv);
        struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
        struct vb2_queue *vq;
        struct mtk_q_data *q_data;

        vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
        if (!vq) {
                mtk_v4l2_err("no vb2 queue for type=%d", f->type);
                return -EINVAL;
        }

        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.y_bs_sz +
                                        ctx->picinfo.y_len_sz;
                q_data->sizeimage[1] = ctx->picinfo.c_bs_sz +
                                        ctx->picinfo.c_len_sz;
                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;

                /*
                 * 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_debug(1, "[%d] type=%d state=%d Format information could not be read, not ready yet!",
                                ctx->id, f->type, ctx->state);
        }

        return 0;
}

static 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_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_err("vq->type=%d err\n", vq->type);
                return -EINVAL;
        }

        if (*nplanes) {
                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 = 2;
                else
                        *nplanes = 1;

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

        mtk_v4l2_debug(1,
                        "[%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;
}

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

        mtk_v4l2_debug(3, "[%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_err("data will not fit into plane %d (%lu < %d)",
                                i, vb2_plane_size(vb, i),
                                q_data->sizeimage[i]);
                }
        }

        return 0;
}

static void vb2ops_vdec_buf_queue(struct vb2_buffer *vb)
{
        struct vb2_buffer *src_buf;
        struct mtk_vcodec_mem src_mem;
        bool res_chg = false;
        int ret = 0;
        unsigned int dpbsize = 1;
        struct mtk_vcodec_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct vb2_v4l2_buffer *vb2_v4l2 = NULL;
        struct mtk_video_dec_buf *buf = NULL;

        mtk_v4l2_debug(3, "[%d] (%d) id=%d, vb=%p",
                        ctx->id, vb->vb2_queue->type,
                        vb->index, vb);
        /*
         * check if this buffer is ready to be used after decode
         */
        if (vb->vb2_queue->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
                vb2_v4l2 = to_vb2_v4l2_buffer(vb);
                buf = container_of(vb2_v4l2, struct mtk_video_dec_buf, vb);
                mutex_lock(&ctx->lock);
                if (buf->used == false) {
                        v4l2_m2m_buf_queue(ctx->m2m_ctx, vb2_v4l2);
                        buf->queued_in_vb2 = true;
                        buf->queued_in_v4l2 = true;
                        buf->ready_to_display = false;
                } else {
                        buf->queued_in_vb2 = false;
                        buf->queued_in_v4l2 = true;
                        buf->ready_to_display = false;
                }
                mutex_unlock(&ctx->lock);
                return;
        }

        v4l2_m2m_buf_queue(ctx->m2m_ctx, to_vb2_v4l2_buffer(vb));

        if (ctx->state != MTK_STATE_INIT) {
                mtk_v4l2_debug(3, "[%d] already init driver %d",
                                ctx->id, ctx->state);
                return;
        }

        src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
        if (!src_buf) {
                mtk_v4l2_err("No src buffer");
                return;
        }
        vb2_v4l2 = to_vb2_v4l2_buffer(src_buf);
        buf = container_of(vb2_v4l2, struct mtk_video_dec_buf, vb);
        if (buf->lastframe) {
                /* This shouldn't happen. Just in case. */
                mtk_v4l2_err("Invalid flush buffer.");
                v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
                return;
        }

        src_mem.va = vb2_plane_vaddr(src_buf, 0);
        src_mem.dma_addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
        src_mem.size = (size_t)src_buf->planes[0].bytesused;
        mtk_v4l2_debug(2,
                        "[%d] buf id=%d va=%p dma=%pad size=%zx",
                        ctx->id, src_buf->index,
                        src_mem.va, &src_mem.dma_addr,
                        src_mem.size);

        ret = vdec_if_decode(ctx, &src_mem, NULL, &res_chg);
        if (ret || !res_chg) {
                /*
                 * fb == NULL menas to parse SPS/PPS header or
                 * resolution info in src_mem. Decode can fail
                 * if there is no SPS header or picture info
                 * in bs
                 */

                src_buf = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
                if (ret == -EIO) {
                        mtk_v4l2_err("[%d] Unrecoverable error in vdec_if_decode.",
                                        ctx->id);
                        ctx->state = MTK_STATE_ABORT;
                        v4l2_m2m_buf_done(to_vb2_v4l2_buffer(src_buf),
                                                VB2_BUF_STATE_ERROR);
                } else {
                        v4l2_m2m_buf_done(to_vb2_v4l2_buffer(src_buf),
                                                VB2_BUF_STATE_DONE);
                }
                mtk_v4l2_debug(ret ? 0 : 1,
                               "[%d] vdec_if_decode() src_buf=%d, size=%zu, fail=%d, res_chg=%d",
                               ctx->id, src_buf->index,
                               src_mem.size, ret, res_chg);
                return;
        }

        if (vdec_if_get_param(ctx, GET_PARAM_PIC_INFO, &ctx->picinfo)) {
                mtk_v4l2_err("[%d]Error!! Cannot get param : GET_PARAM_PICTURE_INFO ERR",
                                ctx->id);
                return;
        }

        ctx->last_decoded_picinfo = ctx->picinfo;
        ctx->q_data[MTK_Q_DATA_DST].sizeimage[0] =
                                                ctx->picinfo.y_bs_sz +
                                                ctx->picinfo.y_len_sz;
        ctx->q_data[MTK_Q_DATA_DST].bytesperline[0] =
                                                ctx->picinfo.buf_w;
        ctx->q_data[MTK_Q_DATA_DST].sizeimage[1] =
                                                ctx->picinfo.c_bs_sz +
                                                ctx->picinfo.c_len_sz;
        ctx->q_data[MTK_Q_DATA_DST].bytesperline[1] = ctx->picinfo.buf_w;
        mtk_v4l2_debug(2, "[%d] vdec_if_init() OK wxh=%dx%d pic wxh=%dx%d sz[0]=0x%x sz[1]=0x%x",
                        ctx->id,
                        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]);

        ret = vdec_if_get_param(ctx, GET_PARAM_DPB_SIZE, &dpbsize);
        if (dpbsize == 0)
                mtk_v4l2_err("[%d] GET_PARAM_DPB_SIZE fail=%d", ctx->id, ret);

        ctx->dpb_size = dpbsize;
        ctx->state = MTK_STATE_HEADER;
        mtk_v4l2_debug(1, "[%d] dpbsize=%d", ctx->id, ctx->dpb_size);
}

static void vb2ops_vdec_buf_finish(struct vb2_buffer *vb)
{
        struct mtk_vcodec_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, 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_err("Unrecoverable error on buffer.");
                ctx->state = MTK_STATE_ABORT;
        }
}

static 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, vb);

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

        return 0;
}

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

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

        return 0;
}

static void vb2ops_vdec_stop_streaming(struct vb2_queue *q)
{
        struct vb2_buffer *src_buf = NULL, *dst_buf = NULL;
        struct mtk_vcodec_ctx *ctx = vb2_get_drv_priv(q);

        mtk_v4l2_debug(3, "[%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))) {
                        struct vb2_v4l2_buffer *vb2_v4l2 =
                                        to_vb2_v4l2_buffer(src_buf);
                        struct mtk_video_dec_buf *buf_info = container_of(
                                        vb2_v4l2, struct mtk_video_dec_buf, vb);
                        if (!buf_info->lastframe)
                                v4l2_m2m_buf_done(vb2_v4l2,
                                                VB2_BUF_STATE_ERROR);
                }
                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_debug(2,
                                "[%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);

                mtk_vdec_flush_decoder(ctx);
        }
        ctx->state = MTK_STATE_FLUSH;

        while ((dst_buf = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx))) {
                vb2_set_plane_payload(dst_buf, 0, 0);
                vb2_set_plane_payload(dst_buf, 1, 0);
                v4l2_m2m_buf_done(to_vb2_v4l2_buffer(dst_buf),
                                        VB2_BUF_STATE_ERROR);
        }

}

static void m2mops_vdec_device_run(void *priv)
{
        struct mtk_vcodec_ctx *ctx = priv;
        struct mtk_vcodec_dev *dev = ctx->dev;

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

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

        mtk_v4l2_debug(3, "[%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_ctx *ctx = priv;

        ctx->state = MTK_STATE_ABORT;
}

static int mtk_vdec_g_v_ctrl(struct v4l2_ctrl *ctrl)
{
        struct mtk_vcodec_ctx *ctx = ctrl_to_ctx(ctrl);
        int ret = 0;

        switch (ctrl->id) {
        case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
                if (ctx->state >= MTK_STATE_HEADER) {
                        ctrl->val = ctx->dpb_size;
                } else {
                        mtk_v4l2_debug(0, "Seqinfo not ready");
                        ctrl->val = 0;
                }
                break;
        default:
                ret = -EINVAL;
        }
        return ret;
}

static const struct v4l2_ctrl_ops mtk_vcodec_dec_ctrl_ops = {
        .g_volatile_ctrl = mtk_vdec_g_v_ctrl,
};

int mtk_vcodec_dec_ctrls_setup(struct mtk_vcodec_ctx *ctx)
{
        struct v4l2_ctrl *ctrl;

        v4l2_ctrl_handler_init(&ctx->ctrl_hdl, 1);

        ctrl = v4l2_ctrl_new_std(&ctx->ctrl_hdl,
                                &mtk_vcodec_dec_ctrl_ops,
                                V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
                                0, 32, 1, 1);
        ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;

        if (ctx->ctrl_hdl.error) {
                mtk_v4l2_err("Adding control failed %d",
                                ctx->ctrl_hdl.error);
                return ctx->ctrl_hdl.error;
        }

        v4l2_ctrl_handler_setup(&ctx->ctrl_hdl);
        return 0;
}

static void m2mops_vdec_lock(void *m2m_priv)
{
        struct mtk_vcodec_ctx *ctx = m2m_priv;

        mtk_v4l2_debug(3, "[%d]", ctx->id);
        mutex_lock(&ctx->dev->dev_mutex);
}

static void m2mops_vdec_unlock(void *m2m_priv)
{
        struct mtk_vcodec_ctx *ctx = m2m_priv;

        mtk_v4l2_debug(3, "[%d]", ctx->id);
        mutex_unlock(&ctx->dev->dev_mutex);
}

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,
        .lock           = m2mops_vdec_lock,
        .unlock         = m2mops_vdec_unlock,
};

static const struct vb2_ops mtk_vdec_vb2_ops = {
        .queue_setup    = vb2ops_vdec_queue_setup,
        .buf_prepare    = vb2ops_vdec_buf_prepare,
        .buf_queue      = vb2ops_vdec_buf_queue,
        .wait_prepare   = vb2_ops_wait_prepare,
        .wait_finish    = vb2_ops_wait_finish,
        .buf_init       = vb2ops_vdec_buf_init,
        .buf_finish     = vb2ops_vdec_buf_finish,
        .start_streaming        = vb2ops_vdec_start_streaming,
        .stop_streaming = vb2ops_vdec_stop_streaming,
};

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_mplane = vidioc_vdec_enum_fmt_vid_cap_mplane,
        .vidioc_enum_fmt_vid_out_mplane = vidioc_vdec_enum_fmt_vid_out_mplane,
        .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_ctx *ctx = priv;
        int ret = 0;

        mtk_v4l2_debug(3, "[%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             = &mtk_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;

        ret = vb2_queue_init(src_vq);
        if (ret) {
                mtk_v4l2_err("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             = &mtk_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;

        ret = vb2_queue_init(dst_vq);
        if (ret) {
                vb2_queue_release(src_vq);
                mtk_v4l2_err("Failed to initialize videobuf2 queue(capture)");
        }

        return ret;
}