// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Coda multi-standard codec IP
 *
 * Copyright (C) 2012 Vista Silicon S.L.
 *    Javier Martin, <javier.martin@vista-silicon.com>
 *    Xavier Duret
 */

#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/gcd.h>
#include <linux/genalloc.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/kfifo.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <linux/of.h>
#include <linux/ratelimit.h>
#include <linux/reset.h>

#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
#include <media/videobuf2-vmalloc.h>

#include "coda.h"
#include "imx-vdoa.h"

#define CODA_NAME               "coda"

#define CODADX6_MAX_INSTANCES   4
#define CODA_MAX_FORMATS        4

#define CODA_ISRAM_SIZE (2048 * 2)

#define MIN_W 48
#define MIN_H 16

#define S_ALIGN         1 /* multiple of 2 */
#define W_ALIGN         1 /* multiple of 2 */
#define H_ALIGN         1 /* multiple of 2 */

#define fh_to_ctx(__fh) container_of(__fh, struct coda_ctx, fh)

int coda_debug;
module_param(coda_debug, int, 0644);
MODULE_PARM_DESC(coda_debug, "Debug level (0-2)");

static int disable_tiling;
module_param(disable_tiling, int, 0644);
MODULE_PARM_DESC(disable_tiling, "Disable tiled frame buffers");

static int disable_vdoa;
module_param(disable_vdoa, int, 0644);
MODULE_PARM_DESC(disable_vdoa, "Disable Video Data Order Adapter tiled to raster-scan conversion");

static int enable_bwb = 0;
module_param(enable_bwb, int, 0644);
MODULE_PARM_DESC(enable_bwb, "Enable BWB unit for decoding, may crash on certain streams");

void coda_write(struct coda_dev *dev, u32 data, u32 reg)
{
        v4l2_dbg(3, coda_debug, &dev->v4l2_dev,
                 "%s: data=0x%x, reg=0x%x\n", __func__, data, reg);
        writel(data, dev->regs_base + reg);
}

unsigned int coda_read(struct coda_dev *dev, u32 reg)
{
        u32 data;

        data = readl(dev->regs_base + reg);
        v4l2_dbg(3, coda_debug, &dev->v4l2_dev,
                 "%s: data=0x%x, reg=0x%x\n", __func__, data, reg);
        return data;
}

void coda_write_base(struct coda_ctx *ctx, struct coda_q_data *q_data,
                     struct vb2_v4l2_buffer *buf, unsigned int reg_y)
{
        u32 base_y = vb2_dma_contig_plane_dma_addr(&buf->vb2_buf, 0);
        u32 base_cb, base_cr;

        switch (q_data->fourcc) {
        case V4L2_PIX_FMT_YUYV:
                /* Fallthrough: IN -H264-> CODA -NV12 MB-> VDOA -YUYV-> OUT */
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_YUV420:
        default:
                base_cb = base_y + q_data->bytesperline * q_data->height;
                base_cr = base_cb + q_data->bytesperline * q_data->height / 4;
                break;
        case V4L2_PIX_FMT_YVU420:
                /* Switch Cb and Cr for YVU420 format */
                base_cr = base_y + q_data->bytesperline * q_data->height;
                base_cb = base_cr + q_data->bytesperline * q_data->height / 4;
                break;
        case V4L2_PIX_FMT_YUV422P:
                base_cb = base_y + q_data->bytesperline * q_data->height;
                base_cr = base_cb + q_data->bytesperline * q_data->height / 2;
        }

        coda_write(ctx->dev, base_y, reg_y);
        coda_write(ctx->dev, base_cb, reg_y + 4);
        coda_write(ctx->dev, base_cr, reg_y + 8);
}

#define CODA_CODEC(mode, src_fourcc, dst_fourcc, max_w, max_h) \
        { mode, src_fourcc, dst_fourcc, max_w, max_h }

/*
 * Arrays of codecs supported by each given version of Coda:
 *  i.MX27 -> codadx6
 *  i.MX51 -> codahx4
 *  i.MX53 -> coda7
 *  i.MX6  -> coda960
 * Use V4L2_PIX_FMT_YUV420 as placeholder for all supported YUV 4:2:0 variants
 */
static const struct coda_codec codadx6_codecs[] = {
        CODA_CODEC(CODADX6_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,  720, 576),
        CODA_CODEC(CODADX6_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4, 720, 576),
};

static const struct coda_codec codahx4_codecs[] = {
        CODA_CODEC(CODA7_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   720, 576),
        CODA_CODEC(CODA7_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA7_MODE_DECODE_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA7_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1280, 720),
};

static const struct coda_codec coda7_codecs[] = {
        CODA_CODEC(CODA7_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1280, 720),
        CODA_CODEC(CODA7_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1280, 720),
        CODA_CODEC(CODA7_MODE_ENCODE_MJPG, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_JPEG,   8192, 8192),
        CODA_CODEC(CODA7_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA7_MODE_DECODE_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA7_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA7_MODE_DECODE_MJPG, V4L2_PIX_FMT_JPEG,   V4L2_PIX_FMT_YUV420, 8192, 8192),
};

static const struct coda_codec coda9_codecs[] = {
        CODA_CODEC(CODA9_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1920, 1088),
        CODA_CODEC(CODA9_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1920, 1088),
        CODA_CODEC(CODA9_MODE_ENCODE_MJPG, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_JPEG,   8192, 8192),
        CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA9_MODE_DECODE_MP2,  V4L2_PIX_FMT_MPEG2,  V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA9_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1088),
        CODA_CODEC(CODA9_MODE_DECODE_MJPG, V4L2_PIX_FMT_JPEG,   V4L2_PIX_FMT_YUV420, 8192, 8192),
};

struct coda_video_device {
        const char *name;
        enum coda_inst_type type;
        const struct coda_context_ops *ops;
        bool direct;
        u32 src_formats[CODA_MAX_FORMATS];
        u32 dst_formats[CODA_MAX_FORMATS];
};

static const struct coda_video_device coda_bit_encoder = {
        .name = "coda-video-encoder",
        .type = CODA_INST_ENCODER,
        .ops = &coda_bit_encode_ops,
        .src_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
        },
        .dst_formats = {
                V4L2_PIX_FMT_H264,
                V4L2_PIX_FMT_MPEG4,
        },
};

static const struct coda_video_device coda_bit_jpeg_encoder = {
        .name = "coda-jpeg-encoder",
        .type = CODA_INST_ENCODER,
        .ops = &coda_bit_encode_ops,
        .src_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
                V4L2_PIX_FMT_YUV422P,
        },
        .dst_formats = {
                V4L2_PIX_FMT_JPEG,
        },
};

static const struct coda_video_device coda_bit_decoder = {
        .name = "coda-video-decoder",
        .type = CODA_INST_DECODER,
        .ops = &coda_bit_decode_ops,
        .src_formats = {
                V4L2_PIX_FMT_H264,
                V4L2_PIX_FMT_MPEG2,
                V4L2_PIX_FMT_MPEG4,
        },
        .dst_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
                /*
                 * If V4L2_PIX_FMT_YUYV should be default,
                 * set_default_params() must be adjusted.
                 */
                V4L2_PIX_FMT_YUYV,
        },
};

static const struct coda_video_device coda_bit_jpeg_decoder = {
        .name = "coda-jpeg-decoder",
        .type = CODA_INST_DECODER,
        .ops = &coda_bit_decode_ops,
        .src_formats = {
                V4L2_PIX_FMT_JPEG,
        },
        .dst_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
                V4L2_PIX_FMT_YUV422P,
        },
};

static const struct coda_video_device coda9_jpeg_encoder = {
        .name = "coda-jpeg-encoder",
        .type = CODA_INST_ENCODER,
        .ops = &coda9_jpeg_encode_ops,
        .direct = true,
        .src_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
                V4L2_PIX_FMT_YUV422P,
        },
        .dst_formats = {
                V4L2_PIX_FMT_JPEG,
        },
};

static const struct coda_video_device coda9_jpeg_decoder = {
        .name = "coda-jpeg-decoder",
        .type = CODA_INST_DECODER,
        .ops = &coda9_jpeg_decode_ops,
        .direct = true,
        .src_formats = {
                V4L2_PIX_FMT_JPEG,
        },
        .dst_formats = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
                V4L2_PIX_FMT_YUV422P,
        },
};

static const struct coda_video_device *codadx6_video_devices[] = {
        &coda_bit_encoder,
};

static const struct coda_video_device *codahx4_video_devices[] = {
        &coda_bit_encoder,
        &coda_bit_decoder,
};

static const struct coda_video_device *coda7_video_devices[] = {
        &coda_bit_jpeg_encoder,
        &coda_bit_jpeg_decoder,
        &coda_bit_encoder,
        &coda_bit_decoder,
};

static const struct coda_video_device *coda9_video_devices[] = {
        &coda9_jpeg_encoder,
        &coda9_jpeg_decoder,
        &coda_bit_encoder,
        &coda_bit_decoder,
};

/*
 * Normalize all supported YUV 4:2:0 formats to the value used in the codec
 * tables.
 */
static u32 coda_format_normalize_yuv(u32 fourcc)
{
        switch (fourcc) {
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
        case V4L2_PIX_FMT_YUV422P:
        case V4L2_PIX_FMT_YUYV:
                return V4L2_PIX_FMT_YUV420;
        default:
                return fourcc;
        }
}

static const struct coda_codec *coda_find_codec(struct coda_dev *dev,
                                                int src_fourcc, int dst_fourcc)
{
        const struct coda_codec *codecs = dev->devtype->codecs;
        int num_codecs = dev->devtype->num_codecs;
        int k;

        src_fourcc = coda_format_normalize_yuv(src_fourcc);
        dst_fourcc = coda_format_normalize_yuv(dst_fourcc);
        if (src_fourcc == dst_fourcc)
                return NULL;

        for (k = 0; k < num_codecs; k++) {
                if (codecs[k].src_fourcc == src_fourcc &&
                    codecs[k].dst_fourcc == dst_fourcc)
                        break;
        }

        if (k == num_codecs)
                return NULL;

        return &codecs[k];
}

static void coda_get_max_dimensions(struct coda_dev *dev,
                                    const struct coda_codec *codec,
                                    int *max_w, int *max_h)
{
        const struct coda_codec *codecs = dev->devtype->codecs;
        int num_codecs = dev->devtype->num_codecs;
        unsigned int w, h;
        int k;

        if (codec) {
                w = codec->max_w;
                h = codec->max_h;
        } else {
                for (k = 0, w = 0, h = 0; k < num_codecs; k++) {
                        w = max(w, codecs[k].max_w);
                        h = max(h, codecs[k].max_h);
                }
        }

        if (max_w)
                *max_w = w;
        if (max_h)
                *max_h = h;
}

static const struct coda_video_device *to_coda_video_device(struct video_device
                                                            *vdev)
{
        struct coda_dev *dev = video_get_drvdata(vdev);
        unsigned int i = vdev - dev->vfd;

        if (i >= dev->devtype->num_vdevs)
                return NULL;

        return dev->devtype->vdevs[i];
}

const char *coda_product_name(int product)
{
        static char buf[9];

        switch (product) {
        case CODA_DX6:
                return "CodaDx6";
        case CODA_HX4:
                return "CodaHx4";
        case CODA_7541:
                return "CODA7541";
        case CODA_960:
                return "CODA960";
        default:
                snprintf(buf, sizeof(buf), "(0x%04x)", product);
                return buf;
        }
}

static struct vdoa_data *coda_get_vdoa_data(void)
{
        struct device_node *vdoa_node;
        struct platform_device *vdoa_pdev;
        struct vdoa_data *vdoa_data = NULL;

        vdoa_node = of_find_compatible_node(NULL, NULL, "fsl,imx6q-vdoa");
        if (!vdoa_node)
                return NULL;

        vdoa_pdev = of_find_device_by_node(vdoa_node);
        if (!vdoa_pdev)
                goto out;

        vdoa_data = platform_get_drvdata(vdoa_pdev);
        if (!vdoa_data)
                vdoa_data = ERR_PTR(-EPROBE_DEFER);

out:
        of_node_put(vdoa_node);

        return vdoa_data;
}

/*
 * V4L2 ioctl() operations.
 */
static int coda_querycap(struct file *file, void *priv,
                         struct v4l2_capability *cap)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);

        strscpy(cap->driver, CODA_NAME, sizeof(cap->driver));
        strscpy(cap->card, coda_product_name(ctx->dev->devtype->product),
                sizeof(cap->card));
        strscpy(cap->bus_info, "platform:" CODA_NAME, sizeof(cap->bus_info));
        return 0;
}

static const u32 coda_formats_420[CODA_MAX_FORMATS] = {
                V4L2_PIX_FMT_NV12,
                V4L2_PIX_FMT_YUV420,
                V4L2_PIX_FMT_YVU420,
};

static int coda_enum_fmt(struct file *file, void *priv,
                         struct v4l2_fmtdesc *f)
{
        struct video_device *vdev = video_devdata(file);
        const struct coda_video_device *cvd = to_coda_video_device(vdev);
        struct coda_ctx *ctx = fh_to_ctx(priv);
        const u32 *formats;

        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                formats = cvd->src_formats;
        else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
                struct coda_q_data *q_data_src;
                struct vb2_queue *src_vq;

                formats = cvd->dst_formats;

                /*
                 * If the source format is already fixed, only allow the same
                 * chroma subsampling.
                 */
                q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
                src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
                                         V4L2_BUF_TYPE_VIDEO_OUTPUT);
                if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG &&
                    vb2_is_streaming(src_vq)) {
                        if (ctx->params.jpeg_chroma_subsampling ==
                            V4L2_JPEG_CHROMA_SUBSAMPLING_420) {
                                formats = coda_formats_420;
                        } else if (ctx->params.jpeg_chroma_subsampling ==
                                   V4L2_JPEG_CHROMA_SUBSAMPLING_422) {
                                f->pixelformat = V4L2_PIX_FMT_YUV422P;
                                return f->index ? -EINVAL : 0;
                        }
                }
        } else {
                return -EINVAL;
        }

        if (f->index >= CODA_MAX_FORMATS || formats[f->index] == 0)
                return -EINVAL;

        /* Skip YUYV if the vdoa is not available */
        if (!ctx->vdoa && f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
            formats[f->index] == V4L2_PIX_FMT_YUYV)
                return -EINVAL;

        f->pixelformat = formats[f->index];

        return 0;
}

static int coda_g_fmt(struct file *file, void *priv,
                      struct v4l2_format *f)
{
        struct coda_q_data *q_data;
        struct coda_ctx *ctx = fh_to_ctx(priv);

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

        f->fmt.pix.field        = V4L2_FIELD_NONE;
        f->fmt.pix.pixelformat  = q_data->fourcc;
        f->fmt.pix.width        = q_data->width;
        f->fmt.pix.height       = q_data->height;
        f->fmt.pix.bytesperline = q_data->bytesperline;

        f->fmt.pix.sizeimage    = q_data->sizeimage;
        f->fmt.pix.colorspace   = ctx->colorspace;
        f->fmt.pix.xfer_func    = ctx->xfer_func;
        f->fmt.pix.ycbcr_enc    = ctx->ycbcr_enc;
        f->fmt.pix.quantization = ctx->quantization;

        return 0;
}

static int coda_try_pixelformat(struct coda_ctx *ctx, struct v4l2_format *f)
{
        struct coda_q_data *q_data;
        const u32 *formats;
        int i;

        if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                formats = ctx->cvd->src_formats;
        else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
                formats = ctx->cvd->dst_formats;
        else
                return -EINVAL;

        for (i = 0; i < CODA_MAX_FORMATS; i++) {
                /* Skip YUYV if the vdoa is not available */
                if (!ctx->vdoa && f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
                    formats[i] == V4L2_PIX_FMT_YUYV)
                        continue;

                if (formats[i] == f->fmt.pix.pixelformat) {
                        f->fmt.pix.pixelformat = formats[i];
                        return 0;
                }
        }

        /* Fall back to currently set pixelformat */
        q_data = get_q_data(ctx, f->type);
        f->fmt.pix.pixelformat = q_data->fourcc;

        return 0;
}

static int coda_try_fmt_vdoa(struct coda_ctx *ctx, struct v4l2_format *f,
                             bool *use_vdoa)
{
        int err;

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

        if (!use_vdoa)
                return -EINVAL;

        if (!ctx->vdoa) {
                *use_vdoa = false;
                return 0;
        }

        err = vdoa_context_configure(NULL, round_up(f->fmt.pix.width, 16),
                                     f->fmt.pix.height, f->fmt.pix.pixelformat);
        if (err) {
                *use_vdoa = false;
                return 0;
        }

        *use_vdoa = true;
        return 0;
}

static unsigned int coda_estimate_sizeimage(struct coda_ctx *ctx, u32 sizeimage,
                                            u32 width, u32 height)
{
        /*
         * This is a rough estimate for sensible compressed buffer
         * sizes (between 1 and 16 bits per pixel). This could be
         * improved by better format specific worst case estimates.
         */
        return round_up(clamp(sizeimage, width * height / 8,
                                         width * height * 2), PAGE_SIZE);
}

static int coda_try_fmt(struct coda_ctx *ctx, const struct coda_codec *codec,
                        struct v4l2_format *f)
{
        struct coda_dev *dev = ctx->dev;
        unsigned int max_w, max_h;
        enum v4l2_field field;

        field = f->fmt.pix.field;
        if (field == V4L2_FIELD_ANY)
                field = V4L2_FIELD_NONE;
        else if (V4L2_FIELD_NONE != field)
                return -EINVAL;

        /* V4L2 specification suggests the driver corrects the format struct
         * if any of the dimensions is unsupported */
        f->fmt.pix.field = field;

        coda_get_max_dimensions(dev, codec, &max_w, &max_h);
        v4l_bound_align_image(&f->fmt.pix.width, MIN_W, max_w, W_ALIGN,
                              &f->fmt.pix.height, MIN_H, max_h, H_ALIGN,
                              S_ALIGN);

        switch (f->fmt.pix.pixelformat) {
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
                /*
                 * Frame stride must be at least multiple of 8,
                 * but multiple of 16 for h.264 or JPEG 4:2:x
                 */
                f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
                f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                        f->fmt.pix.height * 3 / 2;
                break;
        case V4L2_PIX_FMT_YUYV:
                f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16) * 2;
                f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                        f->fmt.pix.height;
                break;
        case V4L2_PIX_FMT_YUV422P:
                f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
                f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                        f->fmt.pix.height * 2;
                break;
        case V4L2_PIX_FMT_JPEG:
        case V4L2_PIX_FMT_H264:
        case V4L2_PIX_FMT_MPEG4:
        case V4L2_PIX_FMT_MPEG2:
                f->fmt.pix.bytesperline = 0;
                f->fmt.pix.sizeimage = coda_estimate_sizeimage(ctx,
                                                        f->fmt.pix.sizeimage,
                                                        f->fmt.pix.width,
                                                        f->fmt.pix.height);
                break;
        default:
                BUG();
        }

        return 0;
}

static int coda_try_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        const struct coda_q_data *q_data_src;
        const struct coda_codec *codec;
        struct vb2_queue *src_vq;
        int ret;
        bool use_vdoa;

        ret = coda_try_pixelformat(ctx, f);
        if (ret < 0)
                return ret;

        q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);

        /*
         * If the source format is already fixed, only allow the same output
         * resolution. When decoding JPEG images, we also have to make sure to
         * use the same chroma subsampling.
         */
        src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
        if (vb2_is_streaming(src_vq)) {
                f->fmt.pix.width = q_data_src->width;
                f->fmt.pix.height = q_data_src->height;

                if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG) {
                        if (ctx->params.jpeg_chroma_subsampling ==
                            V4L2_JPEG_CHROMA_SUBSAMPLING_420 &&
                            f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P)
                                f->fmt.pix.pixelformat = V4L2_PIX_FMT_NV12;
                        else if (ctx->params.jpeg_chroma_subsampling ==
                                 V4L2_JPEG_CHROMA_SUBSAMPLING_422)
                                f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
                }
        }

        f->fmt.pix.colorspace = ctx->colorspace;
        f->fmt.pix.xfer_func = ctx->xfer_func;
        f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
        f->fmt.pix.quantization = ctx->quantization;

        q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
        codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
                                f->fmt.pix.pixelformat);
        if (!codec)
                return -EINVAL;

        ret = coda_try_fmt(ctx, codec, f);
        if (ret < 0)
                return ret;

        /* The decoders always write complete macroblocks or MCUs */
        if (ctx->inst_type == CODA_INST_DECODER) {
                f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16);
                f->fmt.pix.height = round_up(f->fmt.pix.height, 16);
                if (codec->src_fourcc == V4L2_PIX_FMT_JPEG &&
                    f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P) {
                        f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                               f->fmt.pix.height * 2;
                } else {
                        f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                               f->fmt.pix.height * 3 / 2;
                }

                ret = coda_try_fmt_vdoa(ctx, f, &use_vdoa);
                if (ret < 0)
                        return ret;

                if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
                        if (!use_vdoa)
                                return -EINVAL;

                        f->fmt.pix.bytesperline = round_up(f->fmt.pix.width, 16) * 2;
                        f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
                                f->fmt.pix.height;
                }
        }

        return 0;
}

static void coda_set_default_colorspace(struct v4l2_pix_format *fmt)
{
        enum v4l2_colorspace colorspace;

        if (fmt->pixelformat == V4L2_PIX_FMT_JPEG)
                colorspace = V4L2_COLORSPACE_JPEG;
        else if (fmt->width <= 720 && fmt->height <= 576)
                colorspace = V4L2_COLORSPACE_SMPTE170M;
        else
                colorspace = V4L2_COLORSPACE_REC709;

        fmt->colorspace = colorspace;
        fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
        fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
        fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
}

static int coda_try_fmt_vid_out(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        struct coda_dev *dev = ctx->dev;
        const struct coda_q_data *q_data_dst;
        const struct coda_codec *codec;
        int ret;

        ret = coda_try_pixelformat(ctx, f);
        if (ret < 0)
                return ret;

        if (f->fmt.pix.colorspace == V4L2_COLORSPACE_DEFAULT)
                coda_set_default_colorspace(&f->fmt.pix);

        q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        codec = coda_find_codec(dev, f->fmt.pix.pixelformat, q_data_dst->fourcc);

        return coda_try_fmt(ctx, codec, f);
}

static int coda_s_fmt(struct coda_ctx *ctx, struct v4l2_format *f,
                      struct v4l2_rect *r)
{
        struct coda_q_data *q_data;
        struct vb2_queue *vq;

        vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
        if (!vq)
                return -EINVAL;

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

        if (vb2_is_busy(vq)) {
                v4l2_err(&ctx->dev->v4l2_dev, "%s: %s queue busy: %d\n",
                         __func__, v4l2_type_names[f->type], vq->num_buffers);
                return -EBUSY;
        }

        q_data->fourcc = f->fmt.pix.pixelformat;
        q_data->width = f->fmt.pix.width;
        q_data->height = f->fmt.pix.height;
        q_data->bytesperline = f->fmt.pix.bytesperline;
        q_data->sizeimage = f->fmt.pix.sizeimage;
        if (r) {
                q_data->rect = *r;
        } else {
                q_data->rect.left = 0;
                q_data->rect.top = 0;
                q_data->rect.width = f->fmt.pix.width;
                q_data->rect.height = f->fmt.pix.height;
        }

        switch (f->fmt.pix.pixelformat) {
        case V4L2_PIX_FMT_YUYV:
                ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
                break;
        case V4L2_PIX_FMT_NV12:
                if (!disable_tiling && ctx->use_bit &&
                    ctx->dev->devtype->product == CODA_960) {
                        ctx->tiled_map_type = GDI_TILED_FRAME_MB_RASTER_MAP;
                        break;
                }
                fallthrough;
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
        case V4L2_PIX_FMT_YUV422P:
                ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
                break;
        default:
                break;
        }

        if (ctx->tiled_map_type == GDI_TILED_FRAME_MB_RASTER_MAP &&
            !coda_try_fmt_vdoa(ctx, f, &ctx->use_vdoa) &&
            ctx->use_vdoa)
                vdoa_context_configure(ctx->vdoa,
                                       round_up(f->fmt.pix.width, 16),
                                       f->fmt.pix.height,
                                       f->fmt.pix.pixelformat);
        else
                ctx->use_vdoa = false;

        coda_dbg(1, ctx, "Setting %s format, wxh: %dx%d, fmt: %4.4s %c\n",
                 v4l2_type_names[f->type], q_data->width, q_data->height,
                 (char *)&q_data->fourcc,
                 (ctx->tiled_map_type == GDI_LINEAR_FRAME_MAP) ? 'L' : 'T');

        return 0;
}

static int coda_s_fmt_vid_cap(struct file *file, void *priv,
                              struct v4l2_format *f)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        struct coda_q_data *q_data_src;
        const struct coda_codec *codec;
        struct v4l2_rect r;
        int ret;

        ret = coda_try_fmt_vid_cap(file, priv, f);
        if (ret)
                return ret;

        q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
        r.left = 0;
        r.top = 0;
        r.width = q_data_src->width;
        r.height = q_data_src->height;

        ret = coda_s_fmt(ctx, f, &r);
        if (ret)
                return ret;

        if (ctx->inst_type != CODA_INST_ENCODER)
                return 0;

        /* Setting the coded format determines the selected codec */
        codec = coda_find_codec(ctx->dev, q_data_src->fourcc,
                                f->fmt.pix.pixelformat);
        if (!codec) {
                v4l2_err(&ctx->dev->v4l2_dev, "failed to determine codec\n");
                return -EINVAL;
        }
        ctx->codec = codec;

        ctx->colorspace = f->fmt.pix.colorspace;
        ctx->xfer_func = f->fmt.pix.xfer_func;
        ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
        ctx->quantization = f->fmt.pix.quantization;

        return 0;
}

static int coda_s_fmt_vid_out(struct file *file, void *priv,
                              struct v4l2_format *f)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        const struct coda_codec *codec;
        struct v4l2_format f_cap;
        struct vb2_queue *dst_vq;
        int ret;

        ret = coda_try_fmt_vid_out(file, priv, f);
        if (ret)
                return ret;

        ret = coda_s_fmt(ctx, f, NULL);
        if (ret)
                return ret;

        ctx->colorspace = f->fmt.pix.colorspace;
        ctx->xfer_func = f->fmt.pix.xfer_func;
        ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
        ctx->quantization = f->fmt.pix.quantization;

        if (ctx->inst_type != CODA_INST_DECODER)
                return 0;

        /* Setting the coded format determines the selected codec */
        codec = coda_find_codec(ctx->dev, f->fmt.pix.pixelformat,
                                V4L2_PIX_FMT_YUV420);
        if (!codec) {
                v4l2_err(&ctx->dev->v4l2_dev, "failed to determine codec\n");
                return -EINVAL;
        }
        ctx->codec = codec;

        dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        if (!dst_vq)
                return -EINVAL;

        /*
         * Setting the capture queue format is not possible while the capture
         * queue is still busy. This is not an error, but the user will have to
         * make sure themselves that the capture format is set correctly before
         * starting the output queue again.
         */
        if (vb2_is_busy(dst_vq))
                return 0;

        memset(&f_cap, 0, sizeof(f_cap));
        f_cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        coda_g_fmt(file, priv, &f_cap);
        f_cap.fmt.pix.width = f->fmt.pix.width;
        f_cap.fmt.pix.height = f->fmt.pix.height;

        return coda_s_fmt_vid_cap(file, priv, &f_cap);
}

static int coda_reqbufs(struct file *file, void *priv,
                        struct v4l2_requestbuffers *rb)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        int ret;

        ret = v4l2_m2m_reqbufs(file, ctx->fh.m2m_ctx, rb);
        if (ret)
                return ret;

        /*
         * Allow to allocate instance specific per-context buffers, such as
         * bitstream ringbuffer, slice buffer, work buffer, etc. if needed.
         */
        if (rb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT && ctx->ops->reqbufs)
                return ctx->ops->reqbufs(ctx, rb);

        return 0;
}

static int coda_qbuf(struct file *file, void *priv,
                     struct v4l2_buffer *buf)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);

        if (ctx->inst_type == CODA_INST_DECODER &&
            buf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                buf->flags &= ~V4L2_BUF_FLAG_LAST;

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

static int coda_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
        struct coda_ctx *ctx = fh_to_ctx(priv);
        int ret;

        ret = v4l2_m2m_dqbuf(file, ctx->fh.m2m_ctx, buf);

        if (ctx->inst_type == CODA_INST_DECODER &&
            buf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                buf->flags &= ~V4L2_BUF_FLAG_LAST;

        return ret;
}

void coda_m2m_buf_done(struct coda_ctx *ctx, struct vb2_v4l2_buffer *buf,
                       enum vb2_buffer_state state)
{
        const struct v4l2_event eos_event = {
                .type = V4L2_EVENT_EOS
        };

        if (buf->flags & V4L2_BUF_FLAG_LAST)
                v4l2_event_queue_fh(&ctx->fh, &eos_event);

        v4l2_m2m_buf_done(buf, state);
}

static int coda_g_selection(struct file *file, void *fh,
                            struct v4l2_selection *s)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);

        struct coda_q_data *q_data;
        struct v4l2_rect r, *rsel;

        q_data = get_q_data(ctx, s->type);
        if (!q_data)
                return -EINVAL;

        r.left = 0;
        r.top = 0;
        r.width = q_data->width;
        r.height = q_data->height;
        rsel = &q_data->rect;

        switch (s->target) {
        case V4L2_SEL_TGT_CROP_DEFAULT:
        case V4L2_SEL_TGT_CROP_BOUNDS:
                rsel = &r;
                fallthrough;
        case V4L2_SEL_TGT_CROP:
                if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
                    ctx->inst_type == CODA_INST_DECODER)
                        return -EINVAL;
                break;
        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
        case V4L2_SEL_TGT_COMPOSE_PADDED:
                rsel = &r;
                fallthrough;
        case V4L2_SEL_TGT_COMPOSE:
        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
                if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
                    ctx->inst_type == CODA_INST_ENCODER)
                        return -EINVAL;
                break;
        default:
                return -EINVAL;
        }

        s->r = *rsel;

        return 0;
}

static int coda_s_selection(struct file *file, void *fh,
                            struct v4l2_selection *s)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct coda_q_data *q_data;

        switch (s->target) {
        case V4L2_SEL_TGT_CROP:
                if (ctx->inst_type == CODA_INST_ENCODER &&
                    s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                        q_data = get_q_data(ctx, s->type);
                        if (!q_data)
                                return -EINVAL;

                        s->r.left = 0;
                        s->r.top = 0;
                        s->r.width = clamp(s->r.width, 2U, q_data->width);
                        s->r.height = clamp(s->r.height, 2U, q_data->height);

                        if (s->flags & V4L2_SEL_FLAG_LE) {
                                s->r.width = round_up(s->r.width, 2);
                                s->r.height = round_up(s->r.height, 2);
                        } else {
                                s->r.width = round_down(s->r.width, 2);
                                s->r.height = round_down(s->r.height, 2);
                        }

                        q_data->rect = s->r;

                        coda_dbg(1, ctx, "Setting crop rectangle: %dx%d\n",
                                 s->r.width, s->r.height);

                        return 0;
                }
                fallthrough;
        case V4L2_SEL_TGT_NATIVE_SIZE:
        case V4L2_SEL_TGT_COMPOSE:
                return coda_g_selection(file, fh, s);
        default:
                /* v4l2-compliance expects this to fail for read-only targets */
                return -EINVAL;
        }
}

static int coda_try_encoder_cmd(struct file *file, void *fh,
                                struct v4l2_encoder_cmd *ec)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);

        if (ctx->inst_type != CODA_INST_ENCODER)
                return -ENOTTY;

        return v4l2_m2m_ioctl_try_encoder_cmd(file, fh, ec);
}

static void coda_wake_up_capture_queue(struct coda_ctx *ctx)
{
        struct vb2_queue *dst_vq;

        coda_dbg(1, ctx, "waking up capture queue\n");

        dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        dst_vq->last_buffer_dequeued = true;
        wake_up(&dst_vq->done_wq);
}

static int coda_encoder_cmd(struct file *file, void *fh,
                            struct v4l2_encoder_cmd *ec)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct vb2_v4l2_buffer *buf;
        int ret;

        ret = coda_try_encoder_cmd(file, fh, ec);
        if (ret < 0)
                return ret;

        mutex_lock(&ctx->wakeup_mutex);
        buf = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx);
        if (buf) {
                /*
                 * If the last output buffer is still on the queue, make sure
                 * that decoder finish_run will see the last flag and report it
                 * to userspace.
                 */
                buf->flags |= V4L2_BUF_FLAG_LAST;
        } else {
                /* Set the stream-end flag on this context */
                ctx->bit_stream_param |= CODA_BIT_STREAM_END_FLAG;

                /*
                 * If the last output buffer has already been taken from the
                 * queue, wake up the capture queue and signal end of stream
                 * via the -EPIPE mechanism.
                 */
                coda_wake_up_capture_queue(ctx);
        }
        mutex_unlock(&ctx->wakeup_mutex);

        return 0;
}

static int coda_try_decoder_cmd(struct file *file, void *fh,
                                struct v4l2_decoder_cmd *dc)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);

        if (ctx->inst_type != CODA_INST_DECODER)
                return -ENOTTY;

        return v4l2_m2m_ioctl_try_decoder_cmd(file, fh, dc);
}

static bool coda_mark_last_meta(struct coda_ctx *ctx)
{
        struct coda_buffer_meta *meta;

        coda_dbg(1, ctx, "marking last meta\n");

        spin_lock(&ctx->buffer_meta_lock);
        if (list_empty(&ctx->buffer_meta_list)) {
                spin_unlock(&ctx->buffer_meta_lock);
                return false;
        }

        meta = list_last_entry(&ctx->buffer_meta_list, struct coda_buffer_meta,
                               list);
        meta->last = true;

        spin_unlock(&ctx->buffer_meta_lock);
        return true;
}

static bool coda_mark_last_dst_buf(struct coda_ctx *ctx)
{
        struct vb2_v4l2_buffer *buf;
        struct vb2_buffer *dst_vb;
        struct vb2_queue *dst_vq;
        unsigned long flags;

        coda_dbg(1, ctx, "marking last capture buffer\n");

        dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        spin_lock_irqsave(&dst_vq->done_lock, flags);
        if (list_empty(&dst_vq->done_list)) {
                spin_unlock_irqrestore(&dst_vq->done_lock, flags);
                return false;
        }

        dst_vb = list_last_entry(&dst_vq->done_list, struct vb2_buffer,
                                 done_entry);
        buf = to_vb2_v4l2_buffer(dst_vb);
        buf->flags |= V4L2_BUF_FLAG_LAST;

        spin_unlock_irqrestore(&dst_vq->done_lock, flags);
        return true;
}

static int coda_decoder_cmd(struct file *file, void *fh,
                            struct v4l2_decoder_cmd *dc)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct coda_dev *dev = ctx->dev;
        struct vb2_v4l2_buffer *buf;
        struct vb2_queue *dst_vq;
        bool stream_end;
        bool wakeup;
        int ret;

        ret = coda_try_decoder_cmd(file, fh, dc);
        if (ret < 0)
                return ret;

        switch (dc->cmd) {
        case V4L2_DEC_CMD_START:
                mutex_lock(&dev->coda_mutex);
                mutex_lock(&ctx->bitstream_mutex);
                coda_bitstream_flush(ctx);
                dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
                                         V4L2_BUF_TYPE_VIDEO_CAPTURE);
                vb2_clear_last_buffer_dequeued(dst_vq);
                ctx->bit_stream_param &= ~CODA_BIT_STREAM_END_FLAG;
                coda_fill_bitstream(ctx, NULL);
                mutex_unlock(&ctx->bitstream_mutex);
                mutex_unlock(&dev->coda_mutex);
                break;
        case V4L2_DEC_CMD_STOP:
                stream_end = false;
                wakeup = false;

                mutex_lock(&ctx->wakeup_mutex);

                buf = v4l2_m2m_last_src_buf(ctx->fh.m2m_ctx);
                if (buf) {
                        coda_dbg(1, ctx, "marking last pending buffer\n");

                        /* Mark last buffer */
                        buf->flags |= V4L2_BUF_FLAG_LAST;

                        if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) == 0) {
                                coda_dbg(1, ctx, "all remaining buffers queued\n");
                                stream_end = true;
                        }
                } else {
                        if (ctx->use_bit)
                                if (coda_mark_last_meta(ctx))
                                        stream_end = true;
                                else
                                        wakeup = true;
                        else
                                if (!coda_mark_last_dst_buf(ctx))
                                        wakeup = true;
                }

                if (stream_end) {
                        coda_dbg(1, ctx, "all remaining buffers queued\n");

                        /* Set the stream-end flag on this context */
                        coda_bit_stream_end_flag(ctx);
                        ctx->hold = false;
                        v4l2_m2m_try_schedule(ctx->fh.m2m_ctx);
                }

                if (wakeup) {
                        /* If there is no buffer in flight, wake up */
                        coda_wake_up_capture_queue(ctx);
                }

                mutex_unlock(&ctx->wakeup_mutex);
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

static int coda_enum_framesizes(struct file *file, void *fh,
                                struct v4l2_frmsizeenum *fsize)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct coda_q_data *q_data_dst;
        const struct coda_codec *codec;

        if (ctx->inst_type != CODA_INST_ENCODER)
                return -ENOTTY;

        if (fsize->index)
                return -EINVAL;

        if (coda_format_normalize_yuv(fsize->pixel_format) ==
            V4L2_PIX_FMT_YUV420) {
                q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
                codec = coda_find_codec(ctx->dev, fsize->pixel_format,
                                        q_data_dst->fourcc);
        } else {
                codec = coda_find_codec(ctx->dev, V4L2_PIX_FMT_YUV420,
                                        fsize->pixel_format);
        }
        if (!codec)
                return -EINVAL;

        fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
        fsize->stepwise.min_width = MIN_W;
        fsize->stepwise.max_width = codec->max_w;
        fsize->stepwise.step_width = 1;
        fsize->stepwise.min_height = MIN_H;
        fsize->stepwise.max_height = codec->max_h;
        fsize->stepwise.step_height = 1;

        return 0;
}

static int coda_enum_frameintervals(struct file *file, void *fh,
                                    struct v4l2_frmivalenum *f)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        int i;

        if (f->index)
                return -EINVAL;

        /* Disallow YUYV if the vdoa is not available */
        if (!ctx->vdoa && f->pixel_format == V4L2_PIX_FMT_YUYV)
                return -EINVAL;

        for (i = 0; i < CODA_MAX_FORMATS; i++) {
                if (f->pixel_format == ctx->cvd->src_formats[i] ||
                    f->pixel_format == ctx->cvd->dst_formats[i])
                        break;
        }
        if (i == CODA_MAX_FORMATS)
                return -EINVAL;

        f->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
        f->stepwise.min.numerator = 1;
        f->stepwise.min.denominator = 65535;
        f->stepwise.max.numerator = 65536;
        f->stepwise.max.denominator = 1;
        f->stepwise.step.numerator = 1;
        f->stepwise.step.denominator = 1;

        return 0;
}

static int coda_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct v4l2_fract *tpf;

        if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
                return -EINVAL;

        a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
        tpf = &a->parm.output.timeperframe;
        tpf->denominator = ctx->params.framerate & CODA_FRATE_RES_MASK;
        tpf->numerator = 1 + (ctx->params.framerate >>
                              CODA_FRATE_DIV_OFFSET);

        return 0;
}

/*
 * Approximate timeperframe v4l2_fract with values that can be written
 * into the 16-bit CODA_FRATE_DIV and CODA_FRATE_RES fields.
 */
static void coda_approximate_timeperframe(struct v4l2_fract *timeperframe)
{
        struct v4l2_fract s = *timeperframe;
        struct v4l2_fract f0;
        struct v4l2_fract f1 = { 1, 0 };
        struct v4l2_fract f2 = { 0, 1 };
        unsigned int i, div, s_denominator;

        /* Lower bound is 1/65535 */
        if (s.numerator == 0 || s.denominator / s.numerator > 65535) {
                timeperframe->numerator = 1;
                timeperframe->denominator = 65535;
                return;
        }

        /* Upper bound is 65536/1 */
        if (s.denominator == 0 || s.numerator / s.denominator > 65536) {
                timeperframe->numerator = 65536;
                timeperframe->denominator = 1;
                return;
        }

        /* Reduce fraction to lowest terms */
        div = gcd(s.numerator, s.denominator);
        if (div > 1) {
                s.numerator /= div;
                s.denominator /= div;
        }

        if (s.numerator <= 65536 && s.denominator < 65536) {
                *timeperframe = s;
                return;
        }

        /* Find successive convergents from continued fraction expansion */
        while (f2.numerator <= 65536 && f2.denominator < 65536) {
                f0 = f1;
                f1 = f2;

                /* Stop when f2 exactly equals timeperframe */
                if (s.numerator == 0)
                        break;

                i = s.denominator / s.numerator;

                f2.numerator = f0.numerator + i * f1.numerator;
                f2.denominator = f0.denominator + i * f2.denominator;

                s_denominator = s.numerator;
                s.numerator = s.denominator % s.numerator;
                s.denominator = s_denominator;
        }

        *timeperframe = f1;
}

static uint32_t coda_timeperframe_to_frate(struct v4l2_fract *timeperframe)
{
        return ((timeperframe->numerator - 1) << CODA_FRATE_DIV_OFFSET) |
                timeperframe->denominator;
}

static int coda_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);
        struct v4l2_fract *tpf;

        if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
                return -EINVAL;

        a->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
        tpf = &a->parm.output.timeperframe;
        coda_approximate_timeperframe(tpf);
        ctx->params.framerate = coda_timeperframe_to_frate(tpf);
        ctx->params.framerate_changed = true;

        return 0;
}

static int coda_subscribe_event(struct v4l2_fh *fh,
                                const struct v4l2_event_subscription *sub)
{
        struct coda_ctx *ctx = fh_to_ctx(fh);

        switch (sub->type) {
        case V4L2_EVENT_EOS:
                return v4l2_event_subscribe(fh, sub, 0, NULL);
        case V4L2_EVENT_SOURCE_CHANGE:
                if (ctx->inst_type == CODA_INST_DECODER)
                        return v4l2_event_subscribe(fh, sub, 0, NULL);
                else
                        return -EINVAL;
        default:
                return v4l2_ctrl_subscribe_event(fh, sub);
        }
}

static const struct v4l2_ioctl_ops coda_ioctl_ops = {
        .vidioc_querycap        = coda_querycap,

        .vidioc_enum_fmt_vid_cap = coda_enum_fmt,
        .vidioc_g_fmt_vid_cap   = coda_g_fmt,
        .vidioc_try_fmt_vid_cap = coda_try_fmt_vid_cap,
        .vidioc_s_fmt_vid_cap   = coda_s_fmt_vid_cap,

        .vidioc_enum_fmt_vid_out = coda_enum_fmt,
        .vidioc_g_fmt_vid_out   = coda_g_fmt,
        .vidioc_try_fmt_vid_out = coda_try_fmt_vid_out,
        .vidioc_s_fmt_vid_out   = coda_s_fmt_vid_out,

        .vidioc_reqbufs         = coda_reqbufs,
        .vidioc_querybuf        = v4l2_m2m_ioctl_querybuf,

        .vidioc_qbuf            = coda_qbuf,
        .vidioc_expbuf          = v4l2_m2m_ioctl_expbuf,
        .vidioc_dqbuf           = coda_dqbuf,
        .vidioc_create_bufs     = v4l2_m2m_ioctl_create_bufs,
        .vidioc_prepare_buf     = v4l2_m2m_ioctl_prepare_buf,

        .vidioc_streamon        = v4l2_m2m_ioctl_streamon,
        .vidioc_streamoff       = v4l2_m2m_ioctl_streamoff,

        .vidioc_g_selection     = coda_g_selection,
        .vidioc_s_selection     = coda_s_selection,

        .vidioc_try_encoder_cmd = coda_try_encoder_cmd,
        .vidioc_encoder_cmd     = coda_encoder_cmd,
        .vidioc_try_decoder_cmd = coda_try_decoder_cmd,
        .vidioc_decoder_cmd     = coda_decoder_cmd,

        .vidioc_g_parm          = coda_g_parm,
        .vidioc_s_parm          = coda_s_parm,

        .vidioc_enum_framesizes = coda_enum_framesizes,
        .vidioc_enum_frameintervals = coda_enum_frameintervals,

        .vidioc_subscribe_event = coda_subscribe_event,
        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};

/*
 * Mem-to-mem operations.
 */

static void coda_device_run(void *m2m_priv)
{
        struct coda_ctx *ctx = m2m_priv;
        struct coda_dev *dev = ctx->dev;

        queue_work(dev->workqueue, &ctx->pic_run_work);
}

static void coda_pic_run_work(struct work_struct *work)
{
        struct coda_ctx *ctx = container_of(work, struct coda_ctx, pic_run_work);
        struct coda_dev *dev = ctx->dev;
        int ret;

        mutex_lock(&ctx->buffer_mutex);
        mutex_lock(&dev->coda_mutex);

        ret = ctx->ops->prepare_run(ctx);
        if (ret < 0 && ctx->inst_type == CODA_INST_DECODER) {
                mutex_unlock(&dev->coda_mutex);
                mutex_unlock(&ctx->buffer_mutex);
                /* job_finish scheduled by prepare_decode */
                return;
        }

        if (!wait_for_completion_timeout(&ctx->completion,
                                         msecs_to_jiffies(1000))) {
                dev_err(dev->dev, "CODA PIC_RUN timeout\n");

                ctx->hold = true;

                coda_hw_reset(ctx);

                if (ctx->ops->run_timeout)
                        ctx->ops->run_timeout(ctx);
        } else {
                ctx->ops->finish_run(ctx);
        }

        if ((ctx->aborting || (!ctx->streamon_cap && !ctx->streamon_out)) &&
            ctx->ops->seq_end_work)
                queue_work(dev->workqueue, &ctx->seq_end_work);

        mutex_unlock(&dev->coda_mutex);
        mutex_unlock(&ctx->buffer_mutex);

        v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
}

static int coda_job_ready(void *m2m_priv)
{
        struct coda_ctx *ctx = m2m_priv;
        int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);

        /*
         * For both 'P' and 'key' frame cases 1 picture
         * and 1 frame are needed. In the decoder case,
         * the compressed frame can be in the bitstream.
         */
        if (!src_bufs && ctx->inst_type != CODA_INST_DECODER) {
                coda_dbg(1, ctx, "not ready: not enough vid-out buffers.\n");
                return 0;
        }

        if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
                coda_dbg(1, ctx, "not ready: not enough vid-cap buffers.\n");
                return 0;
        }

        if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
                bool stream_end = ctx->bit_stream_param &
                                  CODA_BIT_STREAM_END_FLAG;
                int num_metas = ctx->num_metas;
                struct coda_buffer_meta *meta;
                unsigned int count;

                count = hweight32(ctx->frm_dis_flg);
                if (ctx->use_vdoa && count >= (ctx->num_internal_frames - 1)) {
                        coda_dbg(1, ctx,
                                 "not ready: all internal buffers in use: %d/%d (0x%x)",
                                 count, ctx->num_internal_frames,
                                 ctx->frm_dis_flg);
                        return 0;
                }

                if (ctx->hold && !src_bufs) {
                        coda_dbg(1, ctx,
                                 "not ready: on hold for more buffers.\n");
                        return 0;
                }

                if (!stream_end && (num_metas + src_bufs) < 2) {
                        coda_dbg(1, ctx,
                                 "not ready: need 2 buffers available (queue:%d + bitstream:%d)\n",
                                 num_metas, src_bufs);
                        return 0;
                }

                meta = list_first_entry(&ctx->buffer_meta_list,
                                        struct coda_buffer_meta, list);
                if (!coda_bitstream_can_fetch_past(ctx, meta->end) &&
                    !stream_end) {
                        coda_dbg(1, ctx,
                                 "not ready: not enough bitstream data to read past %u (%u)\n",
                                 meta->end, ctx->bitstream_fifo.kfifo.in);
                        return 0;
                }
        }

        if (ctx->aborting) {
                coda_dbg(1, ctx, "not ready: aborting\n");
                return 0;
        }

        coda_dbg(2, ctx, "job ready\n");

        return 1;
}

static void coda_job_abort(void *priv)
{
        struct coda_ctx *ctx = priv;

        ctx->aborting = 1;

        coda_dbg(1, ctx, "job abort\n");
}

static const struct v4l2_m2m_ops coda_m2m_ops = {
        .device_run     = coda_device_run,
        .job_ready      = coda_job_ready,
        .job_abort      = coda_job_abort,
};

static void set_default_params(struct coda_ctx *ctx)
{
        unsigned int max_w, max_h, usize, csize;

        ctx->codec = coda_find_codec(ctx->dev, ctx->cvd->src_formats[0],
                                     ctx->cvd->dst_formats[0]);
        max_w = min(ctx->codec->max_w, 1920U);
        max_h = min(ctx->codec->max_h, 1088U);
        usize = max_w * max_h * 3 / 2;
        csize = coda_estimate_sizeimage(ctx, usize, max_w, max_h);

        ctx->params.codec_mode = ctx->codec->mode;
        if (ctx->cvd->src_formats[0] == V4L2_PIX_FMT_JPEG)
                ctx->colorspace = V4L2_COLORSPACE_JPEG;
        else
                ctx->colorspace = V4L2_COLORSPACE_REC709;
        ctx->xfer_func = V4L2_XFER_FUNC_DEFAULT;
        ctx->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
        ctx->quantization = V4L2_QUANTIZATION_DEFAULT;
        ctx->params.framerate = 30;

        /* Default formats for output and input queues */
        ctx->q_data[V4L2_M2M_SRC].fourcc = ctx->cvd->src_formats[0];
        ctx->q_data[V4L2_M2M_DST].fourcc = ctx->cvd->dst_formats[0];
        ctx->q_data[V4L2_M2M_SRC].width = max_w;
        ctx->q_data[V4L2_M2M_SRC].height = max_h;
        ctx->q_data[V4L2_M2M_DST].width = max_w;
        ctx->q_data[V4L2_M2M_DST].height = max_h;
        if (ctx->codec->src_fourcc == V4L2_PIX_FMT_YUV420) {
                ctx->q_data[V4L2_M2M_SRC].bytesperline = max_w;
                ctx->q_data[V4L2_M2M_SRC].sizeimage = usize;
                ctx->q_data[V4L2_M2M_DST].bytesperline = 0;
                ctx->q_data[V4L2_M2M_DST].sizeimage = csize;
        } else {
                ctx->q_data[V4L2_M2M_SRC].bytesperline = 0;
                ctx->q_data[V4L2_M2M_SRC].sizeimage = csize;
                ctx->q_data[V4L2_M2M_DST].bytesperline = max_w;
                ctx->q_data[V4L2_M2M_DST].sizeimage = usize;
        }
        ctx->q_data[V4L2_M2M_SRC].rect.width = max_w;
        ctx->q_data[V4L2_M2M_SRC].rect.height = max_h;
        ctx->q_data[V4L2_M2M_DST].rect.width = max_w;
        ctx->q_data[V4L2_M2M_DST].rect.height = max_h;

        /*
         * Since the RBC2AXI logic only supports a single chroma plane,
         * macroblock tiling only works for to NV12 pixel format.
         */
        ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
}

/*
 * Queue operations
 */
static int coda_queue_setup(struct vb2_queue *vq,
                                unsigned int *nbuffers, unsigned int *nplanes,
                                unsigned int sizes[], struct device *alloc_devs[])
{
        struct coda_ctx *ctx = vb2_get_drv_priv(vq);
        struct coda_q_data *q_data;
        unsigned int size;

        q_data = get_q_data(ctx, vq->type);
        size = q_data->sizeimage;

        if (*nplanes)
                return sizes[0] < size ? -EINVAL : 0;

        *nplanes = 1;
        sizes[0] = size;

        coda_dbg(1, ctx, "get %d buffer(s) of size %d each.\n", *nbuffers,
                 size);

        return 0;
}

static int coda_buf_prepare(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct coda_q_data *q_data;

        q_data = get_q_data(ctx, vb->vb2_queue->type);
        if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
                if (vbuf->field == V4L2_FIELD_ANY)
                        vbuf->field = V4L2_FIELD_NONE;
                if (vbuf->field != V4L2_FIELD_NONE) {
                        v4l2_warn(&ctx->dev->v4l2_dev,
                                  "%s field isn't supported\n", __func__);
                        return -EINVAL;
                }
        }

        if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
                v4l2_warn(&ctx->dev->v4l2_dev,
                          "%s data will not fit into plane (%lu < %lu)\n",
                          __func__, vb2_plane_size(vb, 0),
                          (long)q_data->sizeimage);
                return -EINVAL;
        }

        return 0;
}

static void coda_update_menu_ctrl(struct v4l2_ctrl *ctrl, int value)
{
        if (!ctrl)
                return;

        v4l2_ctrl_lock(ctrl);

        /*
         * Extend the control range if the parsed stream contains a known but
         * unsupported value or level.
         */
        if (value > ctrl->maximum) {
                __v4l2_ctrl_modify_range(ctrl, ctrl->minimum, value,
                        ctrl->menu_skip_mask & ~(1 << value),
                        ctrl->default_value);
        } else if (value < ctrl->minimum) {
                __v4l2_ctrl_modify_range(ctrl, value, ctrl->maximum,
                        ctrl->menu_skip_mask & ~(1 << value),
                        ctrl->default_value);
        }

        __v4l2_ctrl_s_ctrl(ctrl, value);

        v4l2_ctrl_unlock(ctrl);
}

void coda_update_profile_level_ctrls(struct coda_ctx *ctx, u8 profile_idc,
                                     u8 level_idc)
{
        const char * const *profile_names;
        const char * const *level_names;
        struct v4l2_ctrl *profile_ctrl;
        struct v4l2_ctrl *level_ctrl;
        const char *codec_name;
        u32 profile_cid;
        u32 level_cid;
        int profile;
        int level;

        switch (ctx->codec->src_fourcc) {
        case V4L2_PIX_FMT_H264:
                codec_name = "H264";
                profile_cid = V4L2_CID_MPEG_VIDEO_H264_PROFILE;
                level_cid = V4L2_CID_MPEG_VIDEO_H264_LEVEL;
                profile_ctrl = ctx->h264_profile_ctrl;
                level_ctrl = ctx->h264_level_ctrl;
                profile = coda_h264_profile(profile_idc);
                level = coda_h264_level(level_idc);
                break;
        case V4L2_PIX_FMT_MPEG2:
                codec_name = "MPEG-2";
                profile_cid = V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE;
                level_cid = V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL;
                profile_ctrl = ctx->mpeg2_profile_ctrl;
                level_ctrl = ctx->mpeg2_level_ctrl;
                profile = coda_mpeg2_profile(profile_idc);
                level = coda_mpeg2_level(level_idc);
                break;
        case V4L2_PIX_FMT_MPEG4:
                codec_name = "MPEG-4";
                profile_cid = V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE;
                level_cid = V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL;
                profile_ctrl = ctx->mpeg4_profile_ctrl;
                level_ctrl = ctx->mpeg4_level_ctrl;
                profile = coda_mpeg4_profile(profile_idc);
                level = coda_mpeg4_level(level_idc);
                break;
        default:
                return;
        }

        profile_names = v4l2_ctrl_get_menu(profile_cid);
        level_names = v4l2_ctrl_get_menu(level_cid);

        if (profile < 0) {
                v4l2_warn(&ctx->dev->v4l2_dev, "Invalid %s profile: %u\n",
                          codec_name, profile_idc);
        } else {
                coda_dbg(1, ctx, "Parsed %s profile: %s\n", codec_name,
                         profile_names[profile]);
                coda_update_menu_ctrl(profile_ctrl, profile);
        }

        if (level < 0) {
                v4l2_warn(&ctx->dev->v4l2_dev, "Invalid %s level: %u\n",
                          codec_name, level_idc);
        } else {
                coda_dbg(1, ctx, "Parsed %s level: %s\n", codec_name,
                         level_names[level]);
                coda_update_menu_ctrl(level_ctrl, level);
        }
}

static void coda_queue_source_change_event(struct coda_ctx *ctx)
{
        static const struct v4l2_event source_change_event = {
                .type = V4L2_EVENT_SOURCE_CHANGE,
                .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
        };

        v4l2_event_queue_fh(&ctx->fh, &source_change_event);
}

static void coda_buf_queue(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct coda_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
        struct vb2_queue *vq = vb->vb2_queue;
        struct coda_q_data *q_data;

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

        /*
         * In the decoder case, immediately try to copy the buffer into the
         * bitstream ringbuffer and mark it as ready to be dequeued.
         */
        if (ctx->bitstream.size && vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                /*
                 * For backwards compatibility, queuing an empty buffer marks
                 * the stream end
                 */
                if (vb2_get_plane_payload(vb, 0) == 0)
                        coda_bit_stream_end_flag(ctx);

                if (q_data->fourcc == V4L2_PIX_FMT_H264) {
                        /*
                         * Unless already done, try to obtain profile_idc and
                         * level_idc from the SPS header. This allows to decide
                         * whether to enable reordering during sequence
                         * initialization.
                         */
                        if (!ctx->params.h264_profile_idc) {
                                coda_sps_parse_profile(ctx, vb);
                                coda_update_profile_level_ctrls(ctx,
                                                ctx->params.h264_profile_idc,
                                                ctx->params.h264_level_idc);
                        }
                }

                mutex_lock(&ctx->bitstream_mutex);
                v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
                if (vb2_is_streaming(vb->vb2_queue))
                        /* This set buf->sequence = ctx->qsequence++ */
                        coda_fill_bitstream(ctx, NULL);
                mutex_unlock(&ctx->bitstream_mutex);

                if (!ctx->initialized) {
                        /*
                         * Run sequence initialization in case the queued
                         * buffer contained headers.
                         */
                        if (vb2_is_streaming(vb->vb2_queue) &&
                            ctx->ops->seq_init_work) {
                                queue_work(ctx->dev->workqueue,
                                           &ctx->seq_init_work);
                                flush_work(&ctx->seq_init_work);
                        }

                        if (ctx->initialized)
                                coda_queue_source_change_event(ctx);
                }
        } else {
                if ((ctx->inst_type == CODA_INST_ENCODER || !ctx->use_bit) &&
                    vq->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
                        vbuf->sequence = ctx->qsequence++;
                v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
        }
}

int coda_alloc_aux_buf(struct coda_dev *dev, struct coda_aux_buf *buf,
                       size_t size, const char *name, struct dentry *parent)
{
        buf->vaddr = dma_alloc_coherent(dev->dev, size, &buf->paddr,
                                        GFP_KERNEL);
        if (!buf->vaddr) {
                v4l2_err(&dev->v4l2_dev,
                         "Failed to allocate %s buffer of size %zu\n",
                         name, size);
                return -ENOMEM;
        }

        buf->size = size;

        if (name && parent) {
                buf->blob.data = buf->vaddr;
                buf->blob.size = size;
                buf->dentry = debugfs_create_blob(name, 0444, parent,
                                                  &buf->blob);
        }

        return 0;
}

void coda_free_aux_buf(struct coda_dev *dev,
                       struct coda_aux_buf *buf)
{
        if (buf->vaddr) {
                dma_free_coherent(dev->dev, buf->size, buf->vaddr, buf->paddr);
                buf->vaddr = NULL;
                buf->size = 0;
                debugfs_remove(buf->dentry);
                buf->dentry = NULL;
        }
}

static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
{
        struct coda_ctx *ctx = vb2_get_drv_priv(q);
        struct v4l2_device *v4l2_dev = &ctx->dev->v4l2_dev;
        struct coda_q_data *q_data_src, *q_data_dst;
        struct v4l2_m2m_buffer *m2m_buf, *tmp;
        struct vb2_v4l2_buffer *buf;
        struct list_head list;
        int ret = 0;

        if (count < 1)
                return -EINVAL;

        coda_dbg(1, ctx, "start streaming %s\n", v4l2_type_names[q->type]);

        INIT_LIST_HEAD(&list);

        q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
        if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit) {
                        /* copy the buffers that were queued before streamon */
                        mutex_lock(&ctx->bitstream_mutex);
                        coda_fill_bitstream(ctx, &list);
                        mutex_unlock(&ctx->bitstream_mutex);

                        if (ctx->dev->devtype->product != CODA_960 &&
                            coda_get_bitstream_payload(ctx) < 512) {
                                v4l2_err(v4l2_dev, "start payload < 512\n");
                                ret = -EINVAL;
                                goto err;
                        }

                        if (!ctx->initialized) {
                                /* Run sequence initialization */
                                if (ctx->ops->seq_init_work) {
                                        queue_work(ctx->dev->workqueue,
                                                   &ctx->seq_init_work);
                                        flush_work(&ctx->seq_init_work);
                                }
                        }
                }

                /*
                 * Check the first input JPEG buffer to determine chroma

                 * subsampling.
                 */
                if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG) {
                        buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
                        ret = coda_jpeg_decode_header(ctx, &buf->vb2_buf);
                        if (ret < 0) {
                                v4l2_err(v4l2_dev,
                                         "failed to decode JPEG header: %d\n",
                                         ret);
                                goto err;
                        }

                        q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
                        q_data_dst->width = round_up(q_data_src->width, 16);
                        q_data_dst->height = round_up(q_data_src->height, 16);
                        q_data_dst->bytesperline = q_data_dst->width;
                        if (ctx->params.jpeg_chroma_subsampling ==
                            V4L2_JPEG_CHROMA_SUBSAMPLING_420) {
                                q_data_dst->sizeimage =
                                                q_data_dst->bytesperline *
                                                q_data_dst->height * 3 / 2;
                                if (q_data_dst->fourcc != V4L2_PIX_FMT_YUV420)
                                        q_data_dst->fourcc = V4L2_PIX_FMT_NV12;
                        } else {
                                q_data_dst->sizeimage =
                                                q_data_dst->bytesperline *
                                                q_data_dst->height * 2;
                                q_data_dst->fourcc = V4L2_PIX_FMT_YUV422P;
                        }
                        q_data_dst->rect.left = 0;
                        q_data_dst->rect.top = 0;
                        q_data_dst->rect.width = q_data_src->width;
                        q_data_dst->rect.height = q_data_src->height;
                }
                ctx->streamon_out = 1;
        } else {
                ctx->streamon_cap = 1;
        }

        /* Don't start the coda unless both queues are on */
        if (!(ctx->streamon_out && ctx->streamon_cap))
                goto out;

        q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        if ((q_data_src->rect.width != q_data_dst->width &&
             round_up(q_data_src->rect.width, 16) != q_data_dst->width) ||
            (q_data_src->rect.height != q_data_dst->height &&
             round_up(q_data_src->rect.height, 16) != q_data_dst->height)) {
                v4l2_err(v4l2_dev, "can't convert %dx%d to %dx%d\n",
                         q_data_src->rect.width, q_data_src->rect.height,
                         q_data_dst->width, q_data_dst->height);
                ret = -EINVAL;
                goto err;
        }

        /* Allow BIT decoder device_run with no new buffers queued */
        if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
                v4l2_m2m_set_src_buffered(ctx->fh.m2m_ctx, true);

        ctx->gopcounter = ctx->params.gop_size - 1;

        if (q_data_dst->fourcc == V4L2_PIX_FMT_JPEG)
                ctx->params.gop_size = 1;
        ctx->gopcounter = ctx->params.gop_size - 1;
        /* Only decoders have this control */
        if (ctx->mb_err_cnt_ctrl)
                v4l2_ctrl_s_ctrl(ctx->mb_err_cnt_ctrl, 0);

        ret = ctx->ops->start_streaming(ctx);
        if (ctx->inst_type == CODA_INST_DECODER) {
                if (ret == -EAGAIN)
                        goto out;
        }
        if (ret < 0)
                goto err;

out:
        if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                list_for_each_entry_safe(m2m_buf, tmp, &list, list) {
                        list_del(&m2m_buf->list);
                        v4l2_m2m_buf_done(&m2m_buf->vb, VB2_BUF_STATE_DONE);
                }
        }
        return 0;

err:
        if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                list_for_each_entry_safe(m2m_buf, tmp, &list, list) {
                        list_del(&m2m_buf->list);
                        v4l2_m2m_buf_done(&m2m_buf->vb, VB2_BUF_STATE_QUEUED);
                }
                while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
                        v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
        } else {
                while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
                        v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED);
        }
        return ret;
}

static void coda_stop_streaming(struct vb2_queue *q)
{
        struct coda_ctx *ctx = vb2_get_drv_priv(q);
        struct coda_dev *dev = ctx->dev;
        struct vb2_v4l2_buffer *buf;
        bool stop;

        stop = ctx->streamon_out && ctx->streamon_cap;

        coda_dbg(1, ctx, "stop streaming %s\n", v4l2_type_names[q->type]);

        if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
                ctx->streamon_out = 0;

                coda_bit_stream_end_flag(ctx);

                ctx->qsequence = 0;

                while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
                        v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
        } else {
                ctx->streamon_cap = 0;

                ctx->osequence = 0;
                ctx->sequence_offset = 0;

                while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx)))
                        v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
        }

        if (stop) {
                struct coda_buffer_meta *meta;

                if (ctx->ops->seq_end_work) {
                        queue_work(dev->workqueue, &ctx->seq_end_work);
                        flush_work(&ctx->seq_end_work);
                }
                spin_lock(&ctx->buffer_meta_lock);
                while (!list_empty(&ctx->buffer_meta_list)) {
                        meta = list_first_entry(&ctx->buffer_meta_list,
                                                struct coda_buffer_meta, list);
                        list_del(&meta->list);
                        kfree(meta);
                }
                ctx->num_metas = 0;
                spin_unlock(&ctx->buffer_meta_lock);
                kfifo_init(&ctx->bitstream_fifo,
                        ctx->bitstream.vaddr, ctx->bitstream.size);
                ctx->runcounter = 0;
                ctx->aborting = 0;
                ctx->hold = false;
        }

        if (!ctx->streamon_out && !ctx->streamon_cap)
                ctx->bit_stream_param &= ~CODA_BIT_STREAM_END_FLAG;
}

static const struct vb2_ops coda_qops = {
        .queue_setup            = coda_queue_setup,
        .buf_prepare            = coda_buf_prepare,
        .buf_queue              = coda_buf_queue,
        .start_streaming        = coda_start_streaming,
        .stop_streaming         = coda_stop_streaming,
        .wait_prepare           = vb2_ops_wait_prepare,
        .wait_finish            = vb2_ops_wait_finish,
};

static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
{
        const char * const *val_names = v4l2_ctrl_get_menu(ctrl->id);
        struct coda_ctx *ctx =
                        container_of(ctrl->handler, struct coda_ctx, ctrls);

        if (val_names)
                coda_dbg(2, ctx, "s_ctrl: id = 0x%x, name = \"%s\", val = %d (\"%s\")\n",
                         ctrl->id, ctrl->name, ctrl->val, val_names[ctrl->val]);
        else
                coda_dbg(2, ctx, "s_ctrl: id = 0x%x, name = \"%s\", val = %d\n",
                         ctrl->id, ctrl->name, ctrl->val);

        switch (ctrl->id) {
        case V4L2_CID_HFLIP:
                if (ctrl->val)
                        ctx->params.rot_mode |= CODA_MIR_HOR;
                else
                        ctx->params.rot_mode &= ~CODA_MIR_HOR;
                break;
        case V4L2_CID_VFLIP:
                if (ctrl->val)
                        ctx->params.rot_mode |= CODA_MIR_VER;
                else
                        ctx->params.rot_mode &= ~CODA_MIR_VER;
                break;
        case V4L2_CID_MPEG_VIDEO_BITRATE:
                ctx->params.bitrate = ctrl->val / 1000;
                ctx->params.bitrate_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
                ctx->params.gop_size = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP:
                ctx->params.h264_intra_qp = ctrl->val;
                ctx->params.h264_intra_qp_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP:
                ctx->params.h264_inter_qp = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_MIN_QP:
                ctx->params.h264_min_qp = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_MAX_QP:
                ctx->params.h264_max_qp = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA:
                ctx->params.h264_slice_alpha_c0_offset_div2 = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA:
                ctx->params.h264_slice_beta_offset_div2 = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
                ctx->params.h264_disable_deblocking_filter_idc = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION:
                ctx->params.h264_constrained_intra_pred_flag = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
                ctx->params.frame_rc_enable = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
                ctx->params.mb_rc_enable = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET:
                ctx->params.h264_chroma_qp_index_offset = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
                /* TODO: switch between baseline and constrained baseline */
                if (ctx->inst_type == CODA_INST_ENCODER)
                        ctx->params.h264_profile_idc = 66;
                break;
        case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
                /* nothing to do, this is set by the encoder */
                break;
        case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:
                ctx->params.mpeg4_intra_qp = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP:
                ctx->params.mpeg4_inter_qp = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
        case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
        case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
        case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
                /* nothing to do, these are fixed */
                break;
        case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
                ctx->params.slice_mode = ctrl->val;
                ctx->params.slice_mode_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB:
                ctx->params.slice_max_mb = ctrl->val;
                ctx->params.slice_mode_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES:
                ctx->params.slice_max_bits = ctrl->val * 8;
                ctx->params.slice_mode_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
                break;
        case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB:
                ctx->params.intra_refresh = ctrl->val;
                ctx->params.intra_refresh_changed = true;
                break;
        case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
                ctx->params.force_ipicture = true;
                break;
        case V4L2_CID_JPEG_COMPRESSION_QUALITY:
                coda_set_jpeg_compression_quality(ctx, ctrl->val);
                break;
        case V4L2_CID_JPEG_RESTART_INTERVAL:
                ctx->params.jpeg_restart_interval = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_VBV_DELAY:
                ctx->params.vbv_delay = ctrl->val;
                break;
        case V4L2_CID_MPEG_VIDEO_VBV_SIZE:
                ctx->params.vbv_size = min(ctrl->val * 8192, 0x7fffffff);
                break;
        default:
                coda_dbg(1, ctx, "Invalid control, id=%d, val=%d\n",
                         ctrl->id, ctrl->val);
                return -EINVAL;
        }

        return 0;
}

static const struct v4l2_ctrl_ops coda_ctrl_ops = {
        .s_ctrl = coda_s_ctrl,
};

static void coda_encode_ctrls(struct coda_ctx *ctx)
{
        int max_gop_size = (ctx->dev->devtype->product == CODA_DX6) ? 60 : 99;

        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_BITRATE, 0, 32767000, 1000, 0);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_GOP_SIZE, 0, max_gop_size, 1, 16);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP, 0, 51, 1, 25);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP, 0, 51, 1, 25);
        if (ctx->dev->devtype->product != CODA_960) {
                v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                        V4L2_CID_MPEG_VIDEO_H264_MIN_QP, 0, 51, 1, 12);
        }
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_MAX_QP, 0, 51, 1, 51);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA, -6, 6, 1, 0);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA, -6, 6, 1, 0);
        v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE,
                V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY,
                0x0, V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION, 0, 1, 1,
                0);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE, 0, 1, 1, 1);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE, 0, 1, 1, 1);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET, -12, 12, 1, 0);
        v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_H264_PROFILE,
                V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE, 0x0,
                V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE);
        if (ctx->dev->devtype->product == CODA_HX4 ||
            ctx->dev->devtype->product == CODA_7541) {
                v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                        V4L2_CID_MPEG_VIDEO_H264_LEVEL,
                        V4L2_MPEG_VIDEO_H264_LEVEL_3_1,
                        ~((1 << V4L2_MPEG_VIDEO_H264_LEVEL_2_0) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_3_0) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_3_1)),
                        V4L2_MPEG_VIDEO_H264_LEVEL_3_1);
        }
        if (ctx->dev->devtype->product == CODA_960) {
                v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                        V4L2_CID_MPEG_VIDEO_H264_LEVEL,
                        V4L2_MPEG_VIDEO_H264_LEVEL_4_0,
                        ~((1 << V4L2_MPEG_VIDEO_H264_LEVEL_2_0) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_3_0) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_3_1) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_3_2) |
                          (1 << V4L2_MPEG_VIDEO_H264_LEVEL_4_0)),
                        V4L2_MPEG_VIDEO_H264_LEVEL_4_0);
        }
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP, 1, 31, 1, 2);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP, 1, 31, 1, 2);
        v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE,
                V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE, 0x0,
                V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE);
        if (ctx->dev->devtype->product == CODA_HX4 ||
            ctx->dev->devtype->product == CODA_7541 ||
            ctx->dev->devtype->product == CODA_960) {
                v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                        V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL,
                        V4L2_MPEG_VIDEO_MPEG4_LEVEL_5,
                        ~(1 << V4L2_MPEG_VIDEO_MPEG4_LEVEL_5),
                        V4L2_MPEG_VIDEO_MPEG4_LEVEL_5);
        }
        v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE,
                V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES, 0x0,
                V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB, 1, 0x3fffffff, 1, 1);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES, 1, 0x3fffffff, 1,
                500);
        v4l2_ctrl_new_std_menu(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_HEADER_MODE,
                V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME,
                (1 << V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE),
                V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB, 0,
                1920 * 1088 / 256, 1, 0);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_VBV_DELAY, 0, 0x7fff, 1, 0);
        /*
         * The maximum VBV size value is 0x7fffffff bits,
         * one bit less than 262144 KiB
         */
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_MPEG_VIDEO_VBV_SIZE, 0, 262144, 1, 0);
}

static void coda_jpeg_encode_ctrls(struct coda_ctx *ctx)
{
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_JPEG_COMPRESSION_QUALITY, 5, 100, 1, 50);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_JPEG_RESTART_INTERVAL, 0, 100, 1, 0);
}

static void coda_decode_ctrls(struct coda_ctx *ctx)
{
        u8 max;

        ctx->h264_profile_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_H264_PROFILE,
                V4L2_MPEG_VIDEO_H264_PROFILE_HIGH,
                ~((1 << V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE) |
                  (1 << V4L2_MPEG_VIDEO_H264_PROFILE_MAIN) |
                  (1 << V4L2_MPEG_VIDEO_H264_PROFILE_HIGH)),
                V4L2_MPEG_VIDEO_H264_PROFILE_HIGH);
        if (ctx->h264_profile_ctrl)
                ctx->h264_profile_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        if (ctx->dev->devtype->product == CODA_HX4 ||
            ctx->dev->devtype->product == CODA_7541)
                max = V4L2_MPEG_VIDEO_H264_LEVEL_4_0;
        else if (ctx->dev->devtype->product == CODA_960)
                max = V4L2_MPEG_VIDEO_H264_LEVEL_4_1;
        else
                return;
        ctx->h264_level_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_H264_LEVEL, max, 0, max);
        if (ctx->h264_level_ctrl)
                ctx->h264_level_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        ctx->mpeg2_profile_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE,
                V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH, 0,
                V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH);
        if (ctx->mpeg2_profile_ctrl)
                ctx->mpeg2_profile_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        ctx->mpeg2_level_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL,
                V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH, 0,
                V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH);
        if (ctx->mpeg2_level_ctrl)
                ctx->mpeg2_level_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        ctx->mpeg4_profile_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE,
                V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY, 0,
                V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY);
        if (ctx->mpeg4_profile_ctrl)
                ctx->mpeg4_profile_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;

        ctx->mpeg4_level_ctrl = v4l2_ctrl_new_std_menu(&ctx->ctrls,
                &coda_ctrl_ops, V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL,
                V4L2_MPEG_VIDEO_MPEG4_LEVEL_5, 0,
                V4L2_MPEG_VIDEO_MPEG4_LEVEL_5);
        if (ctx->mpeg4_level_ctrl)
                ctx->mpeg4_level_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
}

static const struct v4l2_ctrl_config coda_mb_err_cnt_ctrl_config = {
        .id     = V4L2_CID_CODA_MB_ERR_CNT,
        .name   = "Macroblocks Error Count",
        .type   = V4L2_CTRL_TYPE_INTEGER,
        .min    = 0,
        .max    = 0x7fffffff,
        .step   = 1,
};

static int coda_ctrls_setup(struct coda_ctx *ctx)
{
        v4l2_ctrl_handler_init(&ctx->ctrls, 2);

        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_HFLIP, 0, 1, 1, 0);
        v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                V4L2_CID_VFLIP, 0, 1, 1, 0);
        if (ctx->inst_type == CODA_INST_ENCODER) {
                v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                                  V4L2_CID_MIN_BUFFERS_FOR_OUTPUT,
                                  1, 1, 1, 1);
                if (ctx->cvd->dst_formats[0] == V4L2_PIX_FMT_JPEG)
                        coda_jpeg_encode_ctrls(ctx);
                else
                        coda_encode_ctrls(ctx);
        } else {
                v4l2_ctrl_new_std(&ctx->ctrls, &coda_ctrl_ops,
                                  V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
                                  1, 1, 1, 1);
                if (ctx->cvd->src_formats[0] == V4L2_PIX_FMT_H264)
                        coda_decode_ctrls(ctx);

                ctx->mb_err_cnt_ctrl = v4l2_ctrl_new_custom(&ctx->ctrls,
                                                &coda_mb_err_cnt_ctrl_config,
                                                NULL);
                if (ctx->mb_err_cnt_ctrl)
                        ctx->mb_err_cnt_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY;
        }

        if (ctx->ctrls.error) {
                v4l2_err(&ctx->dev->v4l2_dev,
                        "control initialization error (%d)",
                        ctx->ctrls.error);
                return -EINVAL;
        }

        return v4l2_ctrl_handler_setup(&ctx->ctrls);
}

static int coda_queue_init(struct coda_ctx *ctx, struct vb2_queue *vq)
{
        vq->drv_priv = ctx;
        vq->ops = &coda_qops;
        vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
        vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
        vq->lock = &ctx->dev->dev_mutex;
        /* One way to indicate end-of-stream for coda is to set the
         * bytesused == 0. However by default videobuf2 handles bytesused
         * equal to 0 as a special case and changes its value to the size
         * of the buffer. Set the allow_zero_bytesused flag, so
         * that videobuf2 will keep the value of bytesused intact.
         */
        vq->allow_zero_bytesused = 1;
        /*
         * We might be fine with no buffers on some of the queues, but that
         * would need to be reflected in job_ready(). Currently we expect all
         * queues to have at least one buffer queued.
         */
        vq->min_buffers_needed = 1;
        vq->dev = ctx->dev->dev;

        return vb2_queue_init(vq);
}

int coda_encoder_queue_init(void *priv, struct vb2_queue *src_vq,
                            struct vb2_queue *dst_vq)
{
        int ret;

        src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
        src_vq->io_modes = VB2_DMABUF | VB2_MMAP;
        src_vq->mem_ops = &vb2_dma_contig_memops;

        ret = coda_queue_init(priv, src_vq);
        if (ret)
                return ret;

        dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
        dst_vq->mem_ops = &vb2_dma_contig_memops;

        return coda_queue_init(priv, dst_vq);
}

int coda_decoder_queue_init(void *priv, struct vb2_queue *src_vq,
                            struct vb2_queue *dst_vq)
{
        int ret;

        src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
        src_vq->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR;
        src_vq->mem_ops = &vb2_vmalloc_memops;

        ret = coda_queue_init(priv, src_vq);
        if (ret)
                return ret;

        dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
        dst_vq->dma_attrs = DMA_ATTR_NO_KERNEL_MAPPING;
        dst_vq->mem_ops = &vb2_dma_contig_memops;

        return coda_queue_init(priv, dst_vq);
}

/*
 * File operations
 */

static int coda_open(struct file *file)
{
        struct video_device *vdev = video_devdata(file);
        struct coda_dev *dev = video_get_drvdata(vdev);
        struct coda_ctx *ctx;
        unsigned int max = ~0;
        char *name;
        int ret;
        int idx;

        ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
        if (!ctx)
                return -ENOMEM;

        if (dev->devtype->product == CODA_DX6)
                max = CODADX6_MAX_INSTANCES - 1;
        idx = ida_alloc_max(&dev->ida, max, GFP_KERNEL);
        if (idx < 0) {
                ret = idx;
                goto err_coda_max;
        }

        name = kasprintf(GFP_KERNEL, "context%d", idx);
        if (!name) {
                ret = -ENOMEM;
                goto err_coda_name_init;
        }

        ctx->debugfs_entry = debugfs_create_dir(name, dev->debugfs_root);
        kfree(name);

        ctx->cvd = to_coda_video_device(vdev);
        ctx->inst_type = ctx->cvd->type;
        ctx->ops = ctx->cvd->ops;
        ctx->use_bit = !ctx->cvd->direct;
        init_completion(&ctx->completion);
        INIT_WORK(&ctx->pic_run_work, coda_pic_run_work);
        if (ctx->ops->seq_init_work)
                INIT_WORK(&ctx->seq_init_work, ctx->ops->seq_init_work);
        if (ctx->ops->seq_end_work)
                INIT_WORK(&ctx->seq_end_work, ctx->ops->seq_end_work);
        v4l2_fh_init(&ctx->fh, video_devdata(file));
        file->private_data = &ctx->fh;
        v4l2_fh_add(&ctx->fh);
        ctx->dev = dev;
        ctx->idx = idx;

        coda_dbg(1, ctx, "open instance (%p)\n", ctx);

        switch (dev->devtype->product) {
        case CODA_960:
                /*
                 * Enabling the BWB when decoding can hang the firmware with
                 * certain streams. The issue was tracked as ENGR00293425 by
                 * Freescale. As a workaround, disable BWB for all decoders.
                 * The enable_bwb module parameter allows to override this.
                 */
                if (enable_bwb || ctx->inst_type == CODA_INST_ENCODER)
                        ctx->frame_mem_ctrl = CODA9_FRAME_ENABLE_BWB;
                fallthrough;
        case CODA_HX4:
        case CODA_7541:
                ctx->reg_idx = 0;
                break;
        default:
                ctx->reg_idx = idx;
        }
        if (ctx->dev->vdoa && !disable_vdoa) {
                ctx->vdoa = vdoa_context_create(dev->vdoa);
                if (!ctx->vdoa)
                        v4l2_warn(&dev->v4l2_dev,
                                  "Failed to create vdoa context: not using vdoa");
        }
        ctx->use_vdoa = false;

        /* Power up and upload firmware if necessary */
        ret = pm_runtime_resume_and_get(dev->dev);
        if (ret < 0) {
                v4l2_err(&dev->v4l2_dev, "failed to power up: %d\n", ret);
                goto err_pm_get;
        }

        ret = clk_prepare_enable(dev->clk_per);
        if (ret)
                goto err_clk_enable;

        ret = clk_prepare_enable(dev->clk_ahb);
        if (ret)
                goto err_clk_ahb;

        set_default_params(ctx);
        ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx,
                                            ctx->ops->queue_init);
        if (IS_ERR(ctx->fh.m2m_ctx)) {
                ret = PTR_ERR(ctx->fh.m2m_ctx);

                v4l2_err(&dev->v4l2_dev, "%s return error (%d)\n",
                         __func__, ret);
                goto err_ctx_init;
        }

        ret = coda_ctrls_setup(ctx);
        if (ret) {
                v4l2_err(&dev->v4l2_dev, "failed to setup coda controls\n");
                goto err_ctrls_setup;
        }

        ctx->fh.ctrl_handler = &ctx->ctrls;

        mutex_init(&ctx->bitstream_mutex);
        mutex_init(&ctx->buffer_mutex);
        mutex_init(&ctx->wakeup_mutex);
        INIT_LIST_HEAD(&ctx->buffer_meta_list);
        spin_lock_init(&ctx->buffer_meta_lock);

        return 0;

err_ctrls_setup:
        v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
err_ctx_init:
        clk_disable_unprepare(dev->clk_ahb);
err_clk_ahb:
        clk_disable_unprepare(dev->clk_per);
err_clk_enable:
        pm_runtime_put_sync(dev->dev);
err_pm_get:
        v4l2_fh_del(&ctx->fh);
        v4l2_fh_exit(&ctx->fh);
err_coda_name_init:
        ida_free(&dev->ida, ctx->idx);
err_coda_max:
        kfree(ctx);
        return ret;
}

static int coda_release(struct file *file)
{
        struct coda_dev *dev = video_drvdata(file);
        struct coda_ctx *ctx = fh_to_ctx(file->private_data);

        coda_dbg(1, ctx, "release instance (%p)\n", ctx);

        if (ctx->inst_type == CODA_INST_DECODER && ctx->use_bit)
                coda_bit_stream_end_flag(ctx);

        /* If this instance is running, call .job_abort and wait for it to end */
        v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);

        if (ctx->vdoa)
                vdoa_context_destroy(ctx->vdoa);

        /* In case the instance was not running, we still need to call SEQ_END */
        if (ctx->ops->seq_end_work) {
                queue_work(dev->workqueue, &ctx->seq_end_work);
                flush_work(&ctx->seq_end_work);
        }

        if (ctx->dev->devtype->product == CODA_DX6)
                coda_free_aux_buf(dev, &ctx->workbuf);

        v4l2_ctrl_handler_free(&ctx->ctrls);
        clk_disable_unprepare(dev->clk_ahb);
        clk_disable_unprepare(dev->clk_per);
        pm_runtime_put_sync(dev->dev);
        v4l2_fh_del(&ctx->fh);
        v4l2_fh_exit(&ctx->fh);
        ida_free(&dev->ida, ctx->idx);
        if (ctx->ops->release)
                ctx->ops->release(ctx);
        debugfs_remove_recursive(ctx->debugfs_entry);
        kfree(ctx);

        return 0;
}

static const struct v4l2_file_operations coda_fops = {
        .owner          = THIS_MODULE,
        .open           = coda_open,
        .release        = coda_release,
        .poll           = v4l2_m2m_fop_poll,
        .unlocked_ioctl = video_ioctl2,
        .mmap           = v4l2_m2m_fop_mmap,
};

static int coda_hw_init(struct coda_dev *dev)
{
        u32 data;
        u16 *p;
        int i, ret;

        ret = clk_prepare_enable(dev->clk_per);
        if (ret)
                goto err_clk_per;

        ret = clk_prepare_enable(dev->clk_ahb);
        if (ret)
                goto err_clk_ahb;

        reset_control_reset(dev->rstc);

        /*
         * Copy the first CODA_ISRAM_SIZE in the internal SRAM.
         * The 16-bit chars in the code buffer are in memory access
         * order, re-sort them to CODA order for register download.
         * Data in this SRAM survives a reboot.
         */
        p = (u16 *)dev->codebuf.vaddr;
        if (dev->devtype->product == CODA_DX6) {
                for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++)  {
                        data = CODA_DOWN_ADDRESS_SET(i) |
                                CODA_DOWN_DATA_SET(p[i ^ 1]);
                        coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
                }
        } else {
                for (i = 0; i < (CODA_ISRAM_SIZE / 2); i++) {
                        data = CODA_DOWN_ADDRESS_SET(i) |
                                CODA_DOWN_DATA_SET(p[round_down(i, 4) +
                                                        3 - (i % 4)]);
                        coda_write(dev, data, CODA_REG_BIT_CODE_DOWN);
                }
        }

        /* Clear registers */
        for (i = 0; i < 64; i++)
                coda_write(dev, 0, CODA_REG_BIT_CODE_BUF_ADDR + i * 4);

        /* Tell the BIT where to find everything it needs */
        if (dev->devtype->product == CODA_960 ||
            dev->devtype->product == CODA_7541 ||
            dev->devtype->product == CODA_HX4) {
                coda_write(dev, dev->tempbuf.paddr,
                                CODA_REG_BIT_TEMP_BUF_ADDR);
                coda_write(dev, 0, CODA_REG_BIT_BIT_STREAM_PARAM);
        } else {
                coda_write(dev, dev->workbuf.paddr,
                              CODA_REG_BIT_WORK_BUF_ADDR);
        }
        coda_write(dev, dev->codebuf.paddr,
                      CODA_REG_BIT_CODE_BUF_ADDR);
        coda_write(dev, 0, CODA_REG_BIT_CODE_RUN);

        /* Set default values */
        switch (dev->devtype->product) {
        case CODA_DX6:
                coda_write(dev, CODADX6_STREAM_BUF_PIC_FLUSH,
                           CODA_REG_BIT_STREAM_CTRL);
                break;
        default:
                coda_write(dev, CODA7_STREAM_BUF_PIC_FLUSH,
                           CODA_REG_BIT_STREAM_CTRL);
        }
        if (dev->devtype->product == CODA_960)
                coda_write(dev, CODA9_FRAME_ENABLE_BWB,
                                CODA_REG_BIT_FRAME_MEM_CTRL);
        else
                coda_write(dev, 0, CODA_REG_BIT_FRAME_MEM_CTRL);

        if (dev->devtype->product != CODA_DX6)
                coda_write(dev, 0, CODA7_REG_BIT_AXI_SRAM_USE);

        coda_write(dev, CODA_INT_INTERRUPT_ENABLE,
                      CODA_REG_BIT_INT_ENABLE);

        /* Reset VPU and start processor */
        data = coda_read(dev, CODA_REG_BIT_CODE_RESET);
        data |= CODA_REG_RESET_ENABLE;
        coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
        udelay(10);
        data &= ~CODA_REG_RESET_ENABLE;
        coda_write(dev, data, CODA_REG_BIT_CODE_RESET);
        coda_write(dev, CODA_REG_RUN_ENABLE, CODA_REG_BIT_CODE_RUN);

        clk_disable_unprepare(dev->clk_ahb);
        clk_disable_unprepare(dev->clk_per);

        return 0;

err_clk_ahb:
        clk_disable_unprepare(dev->clk_per);
err_clk_per:
        return ret;
}

static int coda_register_device(struct coda_dev *dev, int i)
{
        struct video_device *vfd = &dev->vfd[i];
        const char *name;
        int ret;

        if (i >= dev->devtype->num_vdevs)
                return -EINVAL;
        name = dev->devtype->vdevs[i]->name;

        strscpy(vfd->name, dev->devtype->vdevs[i]->name, sizeof(vfd->name));
        vfd->fops       = &coda_fops;
        vfd->ioctl_ops  = &coda_ioctl_ops;
        vfd->release    = video_device_release_empty;
        vfd->lock       = &dev->dev_mutex;
        vfd->v4l2_dev   = &dev->v4l2_dev;
        vfd->vfl_dir    = VFL_DIR_M2M;
        vfd->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
        video_set_drvdata(vfd, dev);

        /* Not applicable, use the selection API instead */
        v4l2_disable_ioctl(vfd, VIDIOC_CROPCAP);
        v4l2_disable_ioctl(vfd, VIDIOC_G_CROP);
        v4l2_disable_ioctl(vfd, VIDIOC_S_CROP);

        ret = video_register_device(vfd, VFL_TYPE_VIDEO, 0);
        if (!ret)
                v4l2_info(&dev->v4l2_dev, "%s registered as %s\n",
                          name, video_device_node_name(vfd));
        return ret;
}

static void coda_copy_firmware(struct coda_dev *dev, const u8 * const buf,
                               size_t size)
{
        u32 *src = (u32 *)buf;

        /* Check if the firmware has a 16-byte Freescale header, skip it */
        if (buf[0] == 'M' && buf[1] == 'X')
                src += 4;
        /*
         * Check whether the firmware is in native order or pre-reordered for
         * memory access. The first instruction opcode always is 0xe40e.
         */
        if (__le16_to_cpup((__le16 *)src) == 0xe40e) {
                u32 *dst = dev->codebuf.vaddr;
                int i;

                /* Firmware in native order, reorder while copying */
                if (dev->devtype->product == CODA_DX6) {
                        for (i = 0; i < (size - 16) / 4; i++)
                                dst[i] = (src[i] << 16) | (src[i] >> 16);
                } else {
                        for (i = 0; i < (size - 16) / 4; i += 2) {
                                dst[i] = (src[i + 1] << 16) | (src[i + 1] >> 16);
                                dst[i + 1] = (src[i] << 16) | (src[i] >> 16);
                        }
                }
        } else {
                /* Copy the already reordered firmware image */
                memcpy(dev->codebuf.vaddr, src, size);
        }
}

static void coda_fw_callback(const struct firmware *fw, void *context);

static int coda_firmware_request(struct coda_dev *dev)
{
        char *fw;

        if (dev->firmware >= ARRAY_SIZE(dev->devtype->firmware))
                return -EINVAL;

        fw = dev->devtype->firmware[dev->firmware];

        dev_dbg(dev->dev, "requesting firmware '%s' for %s\n", fw,
                coda_product_name(dev->devtype->product));

        return request_firmware_nowait(THIS_MODULE, true, fw, dev->dev,
                                       GFP_KERNEL, dev, coda_fw_callback);
}

static void coda_fw_callback(const struct firmware *fw, void *context)
{
        struct coda_dev *dev = context;
        int i, ret;

        if (!fw) {
                dev->firmware++;
                ret = coda_firmware_request(dev);
                if (ret < 0) {
                        v4l2_err(&dev->v4l2_dev, "firmware request failed\n");
                        goto put_pm;
                }
                return;
        }
        if (dev->firmware > 0) {
                /*
                 * Since we can't suppress warnings for failed asynchronous
                 * firmware requests, report that the fallback firmware was
                 * found.
                 */
                dev_info(dev->dev, "Using fallback firmware %s\n",
                         dev->devtype->firmware[dev->firmware]);
        }

        /* allocate auxiliary per-device code buffer for the BIT processor */
        ret = coda_alloc_aux_buf(dev, &dev->codebuf, fw->size, "codebuf",
                                 dev->debugfs_root);
        if (ret < 0)
                goto put_pm;

        coda_copy_firmware(dev, fw->data, fw->size);
        release_firmware(fw);

        ret = coda_hw_init(dev);
        if (ret < 0) {
                v4l2_err(&dev->v4l2_dev, "HW initialization failed\n");
                goto put_pm;
        }

        ret = coda_check_firmware(dev);
        if (ret < 0)
                goto put_pm;

        dev->m2m_dev = v4l2_m2m_init(&coda_m2m_ops);
        if (IS_ERR(dev->m2m_dev)) {
                v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n");
                goto put_pm;
        }