// SPDX-License-Identifier: GPL-2.0-only
/*
 * vivid-vid-cap.c - video capture support functions.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/videodev2.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-common.h>
#include <media/v4l2-event.h>
#include <media/v4l2-dv-timings.h>
#include <media/v4l2-rect.h>

#include "vivid-core.h"
#include "vivid-vid-common.h"
#include "vivid-kthread-cap.h"
#include "vivid-vid-cap.h"

static const struct vivid_fmt formats_ovl[] = {
        {
                .fourcc   = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
                .vdownsampling = { 1 },
                .bit_depth = { 16 },
                .planes   = 1,
                .buffers = 1,
        },
        {
                .fourcc   = V4L2_PIX_FMT_XRGB555, /* gggbbbbb arrrrrgg */
                .vdownsampling = { 1 },
                .bit_depth = { 16 },
                .planes   = 1,
                .buffers = 1,
        },
        {
                .fourcc   = V4L2_PIX_FMT_ARGB555, /* gggbbbbb arrrrrgg */
                .vdownsampling = { 1 },
                .bit_depth = { 16 },
                .planes   = 1,
                .buffers = 1,
        },
};

/* The number of discrete webcam framesizes */
#define VIVID_WEBCAM_SIZES 6
/* The number of discrete webcam frameintervals */
#define VIVID_WEBCAM_IVALS (VIVID_WEBCAM_SIZES * 2)

/* Sizes must be in increasing order */
static const struct v4l2_frmsize_discrete webcam_sizes[VIVID_WEBCAM_SIZES] = {
        {  320, 180 },
        {  640, 360 },
        {  640, 480 },
        { 1280, 720 },
        { 1920, 1080 },
        { 3840, 2160 },
};

/*
 * Intervals must be in increasing order and there must be twice as many
 * elements in this array as there are in webcam_sizes.
 */
static const struct v4l2_fract webcam_intervals[VIVID_WEBCAM_IVALS] = {
        {  1, 1 },
        {  1, 2 },
        {  1, 4 },
        {  1, 5 },
        {  1, 10 },
        {  2, 25 },
        {  1, 15 },
        {  1, 25 },
        {  1, 30 },
        {  1, 40 },
        {  1, 50 },
        {  1, 60 },
};

static int vid_cap_queue_setup(struct vb2_queue *vq,
                       unsigned *nbuffers, unsigned *nplanes,
                       unsigned sizes[], struct device *alloc_devs[])
{
        struct vivid_dev *dev = vb2_get_drv_priv(vq);
        unsigned buffers = tpg_g_buffers(&dev->tpg);
        unsigned h = dev->fmt_cap_rect.height;
        unsigned p;

        if (dev->field_cap == V4L2_FIELD_ALTERNATE) {
                /*
                 * You cannot use read() with FIELD_ALTERNATE since the field
                 * information (TOP/BOTTOM) cannot be passed back to the user.
                 */
                if (vb2_fileio_is_active(vq))
                        return -EINVAL;
        }

        if (dev->queue_setup_error) {
                /*
                 * Error injection: test what happens if queue_setup() returns
                 * an error.
                 */
                dev->queue_setup_error = false;
                return -EINVAL;
        }
        if (*nplanes) {
                /*
                 * Check if the number of requested planes match
                 * the number of buffers in the current format. You can't mix that.
                 */
                if (*nplanes != buffers)
                        return -EINVAL;
                for (p = 0; p < buffers; p++) {
                        if (sizes[p] < tpg_g_line_width(&dev->tpg, p) * h +
                                                dev->fmt_cap->data_offset[p])
                                return -EINVAL;
                }
        } else {
                for (p = 0; p < buffers; p++)
                        sizes[p] = (tpg_g_line_width(&dev->tpg, p) * h) /
                                        dev->fmt_cap->vdownsampling[p] +
                                        dev->fmt_cap->data_offset[p];
        }

        if (vq->num_buffers + *nbuffers < 2)
                *nbuffers = 2 - vq->num_buffers;

        *nplanes = buffers;

        dprintk(dev, 1, "%s: count=%d\n", __func__, *nbuffers);
        for (p = 0; p < buffers; p++)
                dprintk(dev, 1, "%s: size[%u]=%u\n", __func__, p, sizes[p]);

        return 0;
}

static int vid_cap_buf_prepare(struct vb2_buffer *vb)
{
        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
        unsigned long size;
        unsigned buffers = tpg_g_buffers(&dev->tpg);
        unsigned p;

        dprintk(dev, 1, "%s\n", __func__);

        if (WARN_ON(NULL == dev->fmt_cap))
                return -EINVAL;

        if (dev->buf_prepare_error) {
                /*
                 * Error injection: test what happens if buf_prepare() returns
                 * an error.
                 */
                dev->buf_prepare_error = false;
                return -EINVAL;
        }
        for (p = 0; p < buffers; p++) {
                size = (tpg_g_line_width(&dev->tpg, p) *
                        dev->fmt_cap_rect.height) /
                        dev->fmt_cap->vdownsampling[p] +
                        dev->fmt_cap->data_offset[p];

                if (vb2_plane_size(vb, p) < size) {
                        dprintk(dev, 1, "%s data will not fit into plane %u (%lu < %lu)\n",
                                        __func__, p, vb2_plane_size(vb, p), size);
                        return -EINVAL;
                }

                vb2_set_plane_payload(vb, p, size);
                vb->planes[p].data_offset = dev->fmt_cap->data_offset[p];
        }

        return 0;
}

static void vid_cap_buf_finish(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
        struct v4l2_timecode *tc = &vbuf->timecode;
        unsigned fps = 25;
        unsigned seq = vbuf->sequence;

        if (!vivid_is_sdtv_cap(dev))
                return;

        /*
         * Set the timecode. Rarely used, so it is interesting to
         * test this.
         */
        vbuf->flags |= V4L2_BUF_FLAG_TIMECODE;
        if (dev->std_cap[dev->input] & V4L2_STD_525_60)
                fps = 30;
        tc->type = (fps == 30) ? V4L2_TC_TYPE_30FPS : V4L2_TC_TYPE_25FPS;
        tc->flags = 0;
        tc->frames = seq % fps;
        tc->seconds = (seq / fps) % 60;
        tc->minutes = (seq / (60 * fps)) % 60;
        tc->hours = (seq / (60 * 60 * fps)) % 24;
}

static void vid_cap_buf_queue(struct vb2_buffer *vb)
{
        struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
        struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);

        dprintk(dev, 1, "%s\n", __func__);

        spin_lock(&dev->slock);
        list_add_tail(&buf->list, &dev->vid_cap_active);
        spin_unlock(&dev->slock);
}

static int vid_cap_start_streaming(struct vb2_queue *vq, unsigned count)
{
        struct vivid_dev *dev = vb2_get_drv_priv(vq);
        unsigned i;
        int err;

        if (vb2_is_streaming(&dev->vb_vid_out_q))
                dev->can_loop_video = vivid_vid_can_loop(dev);

        dev->vid_cap_seq_count = 0;
        dprintk(dev, 1, "%s\n", __func__);
        for (i = 0; i < VIDEO_MAX_FRAME; i++)
                dev->must_blank[i] = tpg_g_perc_fill(&dev->tpg) < 100;
        if (dev->start_streaming_error) {
                dev->start_streaming_error = false;
                err = -EINVAL;
        } else {
                err = vivid_start_generating_vid_cap(dev, &dev->vid_cap_streaming);
        }
        if (err) {
                struct vivid_buffer *buf, *tmp;

                list_for_each_entry_safe(buf, tmp, &dev->vid_cap_active, list) {
                        list_del(&buf->list);
                        vb2_buffer_done(&buf->vb.vb2_buf,
                                        VB2_BUF_STATE_QUEUED);
                }
        }
        return err;
}

/* abort streaming and wait for last buffer */
static void vid_cap_stop_streaming(struct vb2_queue *vq)
{
        struct vivid_dev *dev = vb2_get_drv_priv(vq);

        dprintk(dev, 1, "%s\n", __func__);
        vivid_stop_generating_vid_cap(dev, &dev->vid_cap_streaming);
        dev->can_loop_video = false;
}

static void vid_cap_buf_request_complete(struct vb2_buffer *vb)
{
        struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);

        v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_vid_cap);
}

const struct vb2_ops vivid_vid_cap_qops = {
        .queue_setup            = vid_cap_queue_setup,
        .buf_prepare            = vid_cap_buf_prepare,
        .buf_finish             = vid_cap_buf_finish,
        .buf_queue              = vid_cap_buf_queue,
        .start_streaming        = vid_cap_start_streaming,
        .stop_streaming         = vid_cap_stop_streaming,
        .buf_request_complete   = vid_cap_buf_request_complete,
        .wait_prepare           = vb2_ops_wait_prepare,
        .wait_finish            = vb2_ops_wait_finish,
};

/*
 * Determine the 'picture' quality based on the current TV frequency: either
 * COLOR for a good 'signal', GRAY (grayscale picture) for a slightly off
 * signal or NOISE for no signal.
 */
void vivid_update_quality(struct vivid_dev *dev)
{
        unsigned freq_modulus;

        if (dev->loop_video && (vivid_is_svid_cap(dev) || vivid_is_hdmi_cap(dev))) {
                /*
                 * The 'noise' will only be replaced by the actual video
                 * if the output video matches the input video settings.
                 */
                tpg_s_quality(&dev->tpg, TPG_QUAL_NOISE, 0);
                return;
        }
        if (vivid_is_hdmi_cap(dev) &&
            VIVID_INVALID_SIGNAL(dev->dv_timings_signal_mode[dev->input])) {
                tpg_s_quality(&dev->tpg, TPG_QUAL_NOISE, 0);
                return;
        }
        if (vivid_is_sdtv_cap(dev) &&
            VIVID_INVALID_SIGNAL(dev->std_signal_mode[dev->input])) {
                tpg_s_quality(&dev->tpg, TPG_QUAL_NOISE, 0);
                return;
        }
        if (!vivid_is_tv_cap(dev)) {
                tpg_s_quality(&dev->tpg, TPG_QUAL_COLOR, 0);
                return;
        }

        /*
         * There is a fake channel every 6 MHz at 49.25, 55.25, etc.
         * From +/- 0.25 MHz around the channel there is color, and from
         * +/- 1 MHz there is grayscale (chroma is lost).
         * Everywhere else it is just noise.
         */
        freq_modulus = (dev->tv_freq - 676 /* (43.25-1) * 16 */) % (6 * 16);
        if (freq_modulus > 2 * 16) {
                tpg_s_quality(&dev->tpg, TPG_QUAL_NOISE,
                        next_pseudo_random32(dev->tv_freq ^ 0x55) & 0x3f);
                return;
        }
        if (freq_modulus < 12 /*0.75 * 16*/ || freq_modulus > 20 /*1.25 * 16*/)
                tpg_s_quality(&dev->tpg, TPG_QUAL_GRAY, 0);
        else
                tpg_s_quality(&dev->tpg, TPG_QUAL_COLOR, 0);
}

/*
 * Get the current picture quality and the associated afc value.
 */
static enum tpg_quality vivid_get_quality(struct vivid_dev *dev, s32 *afc)
{
        unsigned freq_modulus;

        if (afc)
                *afc = 0;
        if (tpg_g_quality(&dev->tpg) == TPG_QUAL_COLOR ||
            tpg_g_quality(&dev->tpg) == TPG_QUAL_NOISE)
                return tpg_g_quality(&dev->tpg);

        /*
         * There is a fake channel every 6 MHz at 49.25, 55.25, etc.
         * From +/- 0.25 MHz around the channel there is color, and from
         * +/- 1 MHz there is grayscale (chroma is lost).
         * Everywhere else it is just gray.
         */
        freq_modulus = (dev->tv_freq - 676 /* (43.25-1) * 16 */) % (6 * 16);
        if (afc)
                *afc = freq_modulus - 1 * 16;
        return TPG_QUAL_GRAY;
}

enum tpg_video_aspect vivid_get_video_aspect(const struct vivid_dev *dev)
{
        if (vivid_is_sdtv_cap(dev))
                return dev->std_aspect_ratio[dev->input];

        if (vivid_is_hdmi_cap(dev))
                return dev->dv_timings_aspect_ratio[dev->input];

        return TPG_VIDEO_ASPECT_IMAGE;
}

static enum tpg_pixel_aspect vivid_get_pixel_aspect(const struct vivid_dev *dev)
{
        if (vivid_is_sdtv_cap(dev))
                return (dev->std_cap[dev->input] & V4L2_STD_525_60) ?
                        TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;

        if (vivid_is_hdmi_cap(dev) &&
            dev->src_rect.width == 720 && dev->src_rect.height <= 576)
                return dev->src_rect.height == 480 ?
                        TPG_PIXEL_ASPECT_NTSC : TPG_PIXEL_ASPECT_PAL;

        return TPG_PIXEL_ASPECT_SQUARE;
}

/*
 * Called whenever the format has to be reset which can occur when
 * changing inputs, standard, timings, etc.
 */
void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls)
{
        struct v4l2_bt_timings *bt = &dev->dv_timings_cap[dev->input].bt;
        unsigned size;
        u64 pixelclock;

        switch (dev->input_type[dev->input]) {
        case WEBCAM:
        default:
                dev->src_rect.width = webcam_sizes[dev->webcam_size_idx].width;
                dev->src_rect.height = webcam_sizes[dev->webcam_size_idx].height;
                dev->timeperframe_vid_cap = webcam_intervals[dev->webcam_ival_idx];
                dev->field_cap = V4L2_FIELD_NONE;
                tpg_s_rgb_range(&dev->tpg, V4L2_DV_RGB_RANGE_AUTO);
                break;
        case TV:
        case SVID:
                dev->field_cap = dev->tv_field_cap;
                dev->src_rect.width = 720;
                if (dev->std_cap[dev->input] & V4L2_STD_525_60) {
                        dev->src_rect.height = 480;
                        dev->timeperframe_vid_cap = (struct v4l2_fract) { 1001, 30000 };
                        dev->service_set_cap = V4L2_SLICED_CAPTION_525;
                } else {
                        dev->src_rect.height = 576;
                        dev->timeperframe_vid_cap = (struct v4l2_fract) { 1000, 25000 };
                        dev->service_set_cap = V4L2_SLICED_WSS_625 | V4L2_SLICED_TELETEXT_B;
                }
                tpg_s_rgb_range(&dev->tpg, V4L2_DV_RGB_RANGE_AUTO);
                break;
        case HDMI:
                dev->src_rect.width = bt->width;
                dev->src_rect.height = bt->height;
                size = V4L2_DV_BT_FRAME_WIDTH(bt) * V4L2_DV_BT_FRAME_HEIGHT(bt);
                if (dev->reduced_fps && can_reduce_fps(bt)) {
                        pixelclock = div_u64(bt->pixelclock * 1000, 1001);
                        bt->flags |= V4L2_DV_FL_REDUCED_FPS;
                } else {
                        pixelclock = bt->pixelclock;
                        bt->flags &= ~V4L2_DV_FL_REDUCED_FPS;
                }
                dev->timeperframe_vid_cap = (struct v4l2_fract) {
                        size / 100, (u32)pixelclock / 100
                };
                if (bt->interlaced)
                        dev->field_cap = V4L2_FIELD_ALTERNATE;
                else
                        dev->field_cap = V4L2_FIELD_NONE;

                /*
                 * We can be called from within s_ctrl, in that case we can't
                 * set/get controls. Luckily we don't need to in that case.
                 */
                if (keep_controls || !dev->colorspace)
                        break;
                if (bt->flags & V4L2_DV_FL_IS_CE_VIDEO) {
                        if (bt->width == 720 && bt->height <= 576)
                                v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_170M);
                        else
                                v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_709);
                        v4l2_ctrl_s_ctrl(dev->real_rgb_range_cap, 1);
                } else {
                        v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_SRGB);
                        v4l2_ctrl_s_ctrl(dev->real_rgb_range_cap, 0);
                }
                tpg_s_rgb_range(&dev->tpg, v4l2_ctrl_g_ctrl(dev->rgb_range_cap));
                break;
        }
        vfree(dev->bitmap_cap);
        dev->bitmap_cap = NULL;
        vivid_update_quality(dev);
        tpg_reset_source(&dev->tpg, dev->src_rect.width, dev->src_rect.height, dev->field_cap);
        dev->crop_cap = dev->src_rect;
        dev->crop_bounds_cap = dev->src_rect;
        dev->compose_cap = dev->crop_cap;
        if (V4L2_FIELD_HAS_T_OR_B(dev->field_cap))
                dev->compose_cap.height /= 2;
        dev->fmt_cap_rect = dev->compose_cap;
        tpg_s_video_aspect(&dev->tpg, vivid_get_video_aspect(dev));
        tpg_s_pixel_aspect(&dev->tpg, vivid_get_pixel_aspect(dev));
        tpg_update_mv_step(&dev->tpg);
}

/* Map the field to something that is valid for the current input */
static enum v4l2_field vivid_field_cap(struct vivid_dev *dev, enum v4l2_field field)
{
        if (vivid_is_sdtv_cap(dev)) {
                switch (field) {
                case V4L2_FIELD_INTERLACED_TB:
                case V4L2_FIELD_INTERLACED_BT:
                case V4L2_FIELD_SEQ_TB:
                case V4L2_FIELD_SEQ_BT:
                case V4L2_FIELD_TOP:
                case V4L2_FIELD_BOTTOM:
                case V4L2_FIELD_ALTERNATE:
                        return field;
                case V4L2_FIELD_INTERLACED:
                default:
                        return V4L2_FIELD_INTERLACED;
                }
        }
        if (vivid_is_hdmi_cap(dev))
                return dev->dv_timings_cap[dev->input].bt.interlaced ?
                        V4L2_FIELD_ALTERNATE : V4L2_FIELD_NONE;
        return V4L2_FIELD_NONE;
}

static unsigned vivid_colorspace_cap(struct vivid_dev *dev)
{
        if (!dev->loop_video || vivid_is_webcam(dev) || vivid_is_tv_cap(dev))
                return tpg_g_colorspace(&dev->tpg);
        return dev->colorspace_out;
}

static unsigned vivid_xfer_func_cap(struct vivid_dev *dev)
{
        if (!dev->loop_video || vivid_is_webcam(dev) || vivid_is_tv_cap(dev))
                return tpg_g_xfer_func(&dev->tpg);
        return dev->xfer_func_out;
}

static unsigned vivid_ycbcr_enc_cap(struct vivid_dev *dev)
{
        if (!dev->loop_video || vivid_is_webcam(dev) || vivid_is_tv_cap(dev))
                return tpg_g_ycbcr_enc(&dev->tpg);
        return dev->ycbcr_enc_out;
}

static unsigned int vivid_hsv_enc_cap(struct vivid_dev *dev)
{
        if (!dev->loop_video || vivid_is_webcam(dev) || vivid_is_tv_cap(dev))
                return tpg_g_hsv_enc(&dev->tpg);
        return dev->hsv_enc_out;
}

static unsigned vivid_quantization_cap(struct vivid_dev *dev)
{
        if (!dev->loop_video || vivid_is_webcam(dev) || vivid_is_tv_cap(dev))
                return tpg_g_quantization(&dev->tpg);
        return dev->quantization_out;
}

int vivid_g_fmt_vid_cap(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);
        struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
        unsigned p;

        mp->width        = dev->fmt_cap_rect.width;
        mp->height       = dev->fmt_cap_rect.height;
        mp->field        = dev->field_cap;
        mp->pixelformat  = dev->fmt_cap->fourcc;
        mp->colorspace   = vivid_colorspace_cap(dev);
        mp->xfer_func    = vivid_xfer_func_cap(dev);
        if (dev->fmt_cap->color_enc == TGP_COLOR_ENC_HSV)
                mp->hsv_enc    = vivid_hsv_enc_cap(dev);
        else
                mp->ycbcr_enc    = vivid_ycbcr_enc_cap(dev);
        mp->quantization = vivid_quantization_cap(dev);
        mp->num_planes = dev->fmt_cap->buffers;
        for (p = 0; p < mp->num_planes; p++) {
                mp->plane_fmt[p].bytesperline = tpg_g_bytesperline(&dev->tpg, p);
                mp->plane_fmt[p].sizeimage =
                        (tpg_g_line_width(&dev->tpg, p) * mp->height) /
                        dev->fmt_cap->vdownsampling[p] +
                        dev->fmt_cap->data_offset[p];
        }
        return 0;
}

int vivid_try_fmt_vid_cap(struct file *file, void *priv,
                        struct v4l2_format *f)
{
        struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
        struct v4l2_plane_pix_format *pfmt = mp->plane_fmt;
        struct vivid_dev *dev = video_drvdata(file);
        const struct vivid_fmt *fmt;
        unsigned bytesperline, max_bpl;
        unsigned factor = 1;
        unsigned w, h;
        unsigned p;
        bool user_set_csc = !!(mp->flags & V4L2_PIX_FMT_FLAG_SET_CSC);

        fmt = vivid_get_format(dev, mp->pixelformat);
        if (!fmt) {
                dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
                        mp->pixelformat);
                mp->pixelformat = V4L2_PIX_FMT_YUYV;
                fmt = vivid_get_format(dev, mp->pixelformat);
        }

        mp->field = vivid_field_cap(dev, mp->field);
        if (vivid_is_webcam(dev)) {
                const struct v4l2_frmsize_discrete *sz =
                        v4l2_find_nearest_size(webcam_sizes,
                                               VIVID_WEBCAM_SIZES, width,
                                               height, mp->width, mp->height);

                w = sz->width;
                h = sz->height;
        } else if (vivid_is_sdtv_cap(dev)) {
                w = 720;
                h = (dev->std_cap[dev->input] & V4L2_STD_525_60) ? 480 : 576;
        } else {
                w = dev->src_rect.width;
                h = dev->src_rect.height;
        }
        if (V4L2_FIELD_HAS_T_OR_B(mp->field))
                factor = 2;
        if (vivid_is_webcam(dev) ||
            (!dev->has_scaler_cap && !dev->has_crop_cap && !dev->has_compose_cap)) {
                mp->width = w;
                mp->height = h / factor;
        } else {
                struct v4l2_rect r = { 0, 0, mp->width, mp->height * factor };

                v4l2_rect_set_min_size(&r, &vivid_min_rect);
                v4l2_rect_set_max_size(&r, &vivid_max_rect);
                if (dev->has_scaler_cap && !dev->has_compose_cap) {
                        struct v4l2_rect max_r = { 0, 0, MAX_ZOOM * w, MAX_ZOOM * h };

                        v4l2_rect_set_max_size(&r, &max_r);
                } else if (!dev->has_scaler_cap && dev->has_crop_cap && !dev->has_compose_cap) {
                        v4l2_rect_set_max_size(&r, &dev->src_rect);
                } else if (!dev->has_scaler_cap && !dev->has_crop_cap) {
                        v4l2_rect_set_min_size(&r, &dev->src_rect);
                }
                mp->width = r.width;
                mp->height = r.height / factor;
        }

        /* This driver supports custom bytesperline values */

        mp->num_planes = fmt->buffers;
        for (p = 0; p < fmt->buffers; p++) {
                /* Calculate the minimum supported bytesperline value */
                bytesperline = (mp->width * fmt->bit_depth[p]) >> 3;
                /* Calculate the maximum supported bytesperline value */
                max_bpl = (MAX_ZOOM * MAX_WIDTH * fmt->bit_depth[p]) >> 3;

                if (pfmt[p].bytesperline > max_bpl)
                        pfmt[p].bytesperline = max_bpl;
                if (pfmt[p].bytesperline < bytesperline)
                        pfmt[p].bytesperline = bytesperline;

                pfmt[p].sizeimage = (pfmt[p].bytesperline * mp->height) /
                                fmt->vdownsampling[p] + fmt->data_offset[p];

                memset(pfmt[p].reserved, 0, sizeof(pfmt[p].reserved));
        }
        for (p = fmt->buffers; p < fmt->planes; p++)
                pfmt[0].sizeimage += (pfmt[0].bytesperline * mp->height *
                        (fmt->bit_depth[p] / fmt->vdownsampling[p])) /
                        (fmt->bit_depth[0] / fmt->vdownsampling[0]);

        if (!user_set_csc || !v4l2_is_colorspace_valid(mp->colorspace))
                mp->colorspace = vivid_colorspace_cap(dev);

        if (!user_set_csc || !v4l2_is_xfer_func_valid(mp->xfer_func))
                mp->xfer_func = vivid_xfer_func_cap(dev);

        if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
                if (!user_set_csc || !v4l2_is_hsv_enc_valid(mp->hsv_enc))
                        mp->hsv_enc = vivid_hsv_enc_cap(dev);
        } else if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
                if (!user_set_csc || !v4l2_is_ycbcr_enc_valid(mp->ycbcr_enc))
                        mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
        } else {
                mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
        }

        if (fmt->color_enc == TGP_COLOR_ENC_YCBCR ||
            fmt->color_enc == TGP_COLOR_ENC_RGB) {
                if (!user_set_csc || !v4l2_is_quant_valid(mp->quantization))
                        mp->quantization = vivid_quantization_cap(dev);
        } else {
                mp->quantization = vivid_quantization_cap(dev);
        }

        memset(mp->reserved, 0, sizeof(mp->reserved));
        return 0;
}

int vivid_s_fmt_vid_cap(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
        struct vivid_dev *dev = video_drvdata(file);
        struct v4l2_rect *crop = &dev->crop_cap;
        struct v4l2_rect *compose = &dev->compose_cap;
        struct vb2_queue *q = &dev->vb_vid_cap_q;
        int ret = vivid_try_fmt_vid_cap(file, priv, f);
        unsigned factor = 1;
        unsigned p;
        unsigned i;

        if (ret < 0)
                return ret;

        if (vb2_is_busy(q)) {
                dprintk(dev, 1, "%s device busy\n", __func__);
                return -EBUSY;
        }

        if (dev->overlay_cap_owner && dev->fb_cap.fmt.pixelformat != mp->pixelformat) {
                dprintk(dev, 1, "overlay is active, can't change pixelformat\n");
                return -EBUSY;
        }

        dev->fmt_cap = vivid_get_format(dev, mp->pixelformat);
        if (V4L2_FIELD_HAS_T_OR_B(mp->field))
                factor = 2;

        /* Note: the webcam input doesn't support scaling, cropping or composing */

        if (!vivid_is_webcam(dev) &&
            (dev->has_scaler_cap || dev->has_crop_cap || dev->has_compose_cap)) {
                struct v4l2_rect r = { 0, 0, mp->width, mp->height };

                if (dev->has_scaler_cap) {
                        if (dev->has_compose_cap)
                                v4l2_rect_map_inside(compose, &r);
                        else
                                *compose = r;
                        if (dev->has_crop_cap && !dev->has_compose_cap) {
                                struct v4l2_rect min_r = {
                                        0, 0,
                                        r.width / MAX_ZOOM,
                                        factor * r.height / MAX_ZOOM
                                };
                                struct v4l2_rect max_r = {
                                        0, 0,
                                        r.width * MAX_ZOOM,
                                        factor * r.height * MAX_ZOOM
                                };

                                v4l2_rect_set_min_size(crop, &min_r);
                                v4l2_rect_set_max_size(crop, &max_r);
                                v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        } else if (dev->has_crop_cap) {
                                struct v4l2_rect min_r = {
                                        0, 0,
                                        compose->width / MAX_ZOOM,
                                        factor * compose->height / MAX_ZOOM
                                };
                                struct v4l2_rect max_r = {
                                        0, 0,
                                        compose->width * MAX_ZOOM,
                                        factor * compose->height * MAX_ZOOM
                                };

                                v4l2_rect_set_min_size(crop, &min_r);
                                v4l2_rect_set_max_size(crop, &max_r);
                                v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        }
                } else if (dev->has_crop_cap && !dev->has_compose_cap) {
                        r.height *= factor;
                        v4l2_rect_set_size_to(crop, &r);
                        v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        r = *crop;
                        r.height /= factor;
                        v4l2_rect_set_size_to(compose, &r);
                } else if (!dev->has_crop_cap) {
                        v4l2_rect_map_inside(compose, &r);
                } else {
                        r.height *= factor;
                        v4l2_rect_set_max_size(crop, &r);
                        v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        compose->top *= factor;
                        compose->height *= factor;
                        v4l2_rect_set_size_to(compose, crop);
                        v4l2_rect_map_inside(compose, &r);
                        compose->top /= factor;
                        compose->height /= factor;
                }
        } else if (vivid_is_webcam(dev)) {
                /* Guaranteed to be a match */
                for (i = 0; i < ARRAY_SIZE(webcam_sizes); i++)
                        if (webcam_sizes[i].width == mp->width &&
                                        webcam_sizes[i].height == mp->height)
                                break;
                dev->webcam_size_idx = i;
                if (dev->webcam_ival_idx >= 2 * (VIVID_WEBCAM_SIZES - i))
                        dev->webcam_ival_idx = 2 * (VIVID_WEBCAM_SIZES - i) - 1;
                vivid_update_format_cap(dev, false);
        } else {
                struct v4l2_rect r = { 0, 0, mp->width, mp->height };

                v4l2_rect_set_size_to(compose, &r);
                r.height *= factor;
                v4l2_rect_set_size_to(crop, &r);
        }

        dev->fmt_cap_rect.width = mp->width;
        dev->fmt_cap_rect.height = mp->height;
        tpg_s_buf_height(&dev->tpg, mp->height);
        tpg_s_fourcc(&dev->tpg, dev->fmt_cap->fourcc);
        for (p = 0; p < tpg_g_buffers(&dev->tpg); p++)
                tpg_s_bytesperline(&dev->tpg, p, mp->plane_fmt[p].bytesperline);
        dev->field_cap = mp->field;
        if (dev->field_cap == V4L2_FIELD_ALTERNATE)
                tpg_s_field(&dev->tpg, V4L2_FIELD_TOP, true);
        else
                tpg_s_field(&dev->tpg, dev->field_cap, false);
        tpg_s_crop_compose(&dev->tpg, &dev->crop_cap, &dev->compose_cap);
        if (vivid_is_sdtv_cap(dev))
                dev->tv_field_cap = mp->field;
        tpg_update_mv_step(&dev->tpg);
        dev->tpg.colorspace = mp->colorspace;
        dev->tpg.xfer_func = mp->xfer_func;
        if (dev->fmt_cap->color_enc == TGP_COLOR_ENC_YCBCR)
                dev->tpg.ycbcr_enc = mp->ycbcr_enc;
        else
                dev->tpg.hsv_enc = mp->hsv_enc;
        dev->tpg.quantization = mp->quantization;

        return 0;
}

int vidioc_g_fmt_vid_cap_mplane(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!dev->multiplanar)
                return -ENOTTY;
        return vivid_g_fmt_vid_cap(file, priv, f);
}

int vidioc_try_fmt_vid_cap_mplane(struct file *file, void *priv,
                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!dev->multiplanar)
                return -ENOTTY;
        return vivid_try_fmt_vid_cap(file, priv, f);
}

int vidioc_s_fmt_vid_cap_mplane(struct file *file, void *priv,
                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!dev->multiplanar)
                return -ENOTTY;
        return vivid_s_fmt_vid_cap(file, priv, f);
}

int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (dev->multiplanar)
                return -ENOTTY;
        return fmt_sp2mp_func(file, priv, f, vivid_g_fmt_vid_cap);
}

int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (dev->multiplanar)
                return -ENOTTY;
        return fmt_sp2mp_func(file, priv, f, vivid_try_fmt_vid_cap);
}

int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (dev->multiplanar)
                return -ENOTTY;
        return fmt_sp2mp_func(file, priv, f, vivid_s_fmt_vid_cap);
}

int vivid_vid_cap_g_selection(struct file *file, void *priv,
                              struct v4l2_selection *sel)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!dev->has_crop_cap && !dev->has_compose_cap)
                return -ENOTTY;
        if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;
        if (vivid_is_webcam(dev))
                return -ENODATA;

        sel->r.left = sel->r.top = 0;
        switch (sel->target) {
        case V4L2_SEL_TGT_CROP:
                if (!dev->has_crop_cap)
                        return -EINVAL;
                sel->r = dev->crop_cap;
                break;
        case V4L2_SEL_TGT_CROP_DEFAULT:
        case V4L2_SEL_TGT_CROP_BOUNDS:
                if (!dev->has_crop_cap)
                        return -EINVAL;
                sel->r = dev->src_rect;
                break;
        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
                if (!dev->has_compose_cap)
                        return -EINVAL;
                sel->r = vivid_max_rect;
                break;
        case V4L2_SEL_TGT_COMPOSE:
                if (!dev->has_compose_cap)
                        return -EINVAL;
                sel->r = dev->compose_cap;
                break;
        case V4L2_SEL_TGT_COMPOSE_DEFAULT:
                if (!dev->has_compose_cap)
                        return -EINVAL;
                sel->r = dev->fmt_cap_rect;
                break;
        default:
                return -EINVAL;
        }
        return 0;
}

int vivid_vid_cap_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
{
        struct vivid_dev *dev = video_drvdata(file);
        struct v4l2_rect *crop = &dev->crop_cap;
        struct v4l2_rect *compose = &dev->compose_cap;
        unsigned factor = V4L2_FIELD_HAS_T_OR_B(dev->field_cap) ? 2 : 1;
        int ret;

        if (!dev->has_crop_cap && !dev->has_compose_cap)
                return -ENOTTY;
        if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;
        if (vivid_is_webcam(dev))
                return -ENODATA;

        switch (s->target) {
        case V4L2_SEL_TGT_CROP:
                if (!dev->has_crop_cap)
                        return -EINVAL;
                ret = vivid_vid_adjust_sel(s->flags, &s->r);
                if (ret)
                        return ret;
                v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
                v4l2_rect_set_max_size(&s->r, &dev->src_rect);
                v4l2_rect_map_inside(&s->r, &dev->crop_bounds_cap);
                s->r.top /= factor;
                s->r.height /= factor;
                if (dev->has_scaler_cap) {
                        struct v4l2_rect fmt = dev->fmt_cap_rect;
                        struct v4l2_rect max_rect = {
                                0, 0,
                                s->r.width * MAX_ZOOM,
                                s->r.height * MAX_ZOOM
                        };
                        struct v4l2_rect min_rect = {
                                0, 0,
                                s->r.width / MAX_ZOOM,
                                s->r.height / MAX_ZOOM
                        };

                        v4l2_rect_set_min_size(&fmt, &min_rect);
                        if (!dev->has_compose_cap)
                                v4l2_rect_set_max_size(&fmt, &max_rect);
                        if (!v4l2_rect_same_size(&dev->fmt_cap_rect, &fmt) &&
                            vb2_is_busy(&dev->vb_vid_cap_q))
                                return -EBUSY;
                        if (dev->has_compose_cap) {
                                v4l2_rect_set_min_size(compose, &min_rect);
                                v4l2_rect_set_max_size(compose, &max_rect);
                        }
                        dev->fmt_cap_rect = fmt;
                        tpg_s_buf_height(&dev->tpg, fmt.height);
                } else if (dev->has_compose_cap) {
                        struct v4l2_rect fmt = dev->fmt_cap_rect;

                        v4l2_rect_set_min_size(&fmt, &s->r);
                        if (!v4l2_rect_same_size(&dev->fmt_cap_rect, &fmt) &&
                            vb2_is_busy(&dev->vb_vid_cap_q))
                                return -EBUSY;
                        dev->fmt_cap_rect = fmt;
                        tpg_s_buf_height(&dev->tpg, fmt.height);
                        v4l2_rect_set_size_to(compose, &s->r);
                        v4l2_rect_map_inside(compose, &dev->fmt_cap_rect);
                } else {
                        if (!v4l2_rect_same_size(&s->r, &dev->fmt_cap_rect) &&
                            vb2_is_busy(&dev->vb_vid_cap_q))
                                return -EBUSY;
                        v4l2_rect_set_size_to(&dev->fmt_cap_rect, &s->r);
                        v4l2_rect_set_size_to(compose, &s->r);
                        v4l2_rect_map_inside(compose, &dev->fmt_cap_rect);
                        tpg_s_buf_height(&dev->tpg, dev->fmt_cap_rect.height);
                }
                s->r.top *= factor;
                s->r.height *= factor;
                *crop = s->r;
                break;
        case V4L2_SEL_TGT_COMPOSE:
                if (!dev->has_compose_cap)
                        return -EINVAL;
                ret = vivid_vid_adjust_sel(s->flags, &s->r);
                if (ret)
                        return ret;
                v4l2_rect_set_min_size(&s->r, &vivid_min_rect);
                v4l2_rect_set_max_size(&s->r, &dev->fmt_cap_rect);
                if (dev->has_scaler_cap) {
                        struct v4l2_rect max_rect = {
                                0, 0,
                                dev->src_rect.width * MAX_ZOOM,
                                (dev->src_rect.height / factor) * MAX_ZOOM
                        };

                        v4l2_rect_set_max_size(&s->r, &max_rect);
                        if (dev->has_crop_cap) {
                                struct v4l2_rect min_rect = {

                                        0, 0,
                                        s->r.width / MAX_ZOOM,
                                        (s->r.height * factor) / MAX_ZOOM
                                };
                                struct v4l2_rect max_rect = {
                                        0, 0,
                                        s->r.width * MAX_ZOOM,
                                        (s->r.height * factor) * MAX_ZOOM
                                };

                                v4l2_rect_set_min_size(crop, &min_rect);
                                v4l2_rect_set_max_size(crop, &max_rect);
                                v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        }
                } else if (dev->has_crop_cap) {
                        s->r.top *= factor;
                        s->r.height *= factor;
                        v4l2_rect_set_max_size(&s->r, &dev->src_rect);
                        v4l2_rect_set_size_to(crop, &s->r);
                        v4l2_rect_map_inside(crop, &dev->crop_bounds_cap);
                        s->r.top /= factor;
                        s->r.height /= factor;
                } else {
                        v4l2_rect_set_size_to(&s->r, &dev->src_rect);
                        s->r.height /= factor;
                }
                v4l2_rect_map_inside(&s->r, &dev->fmt_cap_rect);
                if (dev->bitmap_cap && (compose->width != s->r.width ||
                                        compose->height != s->r.height)) {
                        vfree(dev->bitmap_cap);
                        dev->bitmap_cap = NULL;
                }
                *compose = s->r;
                break;
        default:
                return -EINVAL;
        }

        tpg_s_crop_compose(&dev->tpg, crop, compose);
        return 0;
}

int vivid_vid_cap_g_pixelaspect(struct file *file, void *priv,
                                int type, struct v4l2_fract *f)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                return -EINVAL;

        switch (vivid_get_pixel_aspect(dev)) {
        case TPG_PIXEL_ASPECT_NTSC:
                f->numerator = 11;
                f->denominator = 10;
                break;
        case TPG_PIXEL_ASPECT_PAL:
                f->numerator = 54;
                f->denominator = 59;
                break;
        default:
                break;
        }
        return 0;
}

int vidioc_enum_fmt_vid_overlay(struct file *file, void  *priv,
                                        struct v4l2_fmtdesc *f)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct vivid_fmt *fmt;

        if (dev->multiplanar)
                return -ENOTTY;

        if (f->index >= ARRAY_SIZE(formats_ovl))
                return -EINVAL;

        fmt = &formats_ovl[f->index];

        f->pixelformat = fmt->fourcc;
        return 0;
}

int vidioc_g_fmt_vid_overlay(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct v4l2_rect *compose = &dev->compose_cap;
        struct v4l2_window *win = &f->fmt.win;
        unsigned clipcount = win->clipcount;

        if (dev->multiplanar)
                return -ENOTTY;

        win->w.top = dev->overlay_cap_top;
        win->w.left = dev->overlay_cap_left;
        win->w.width = compose->width;
        win->w.height = compose->height;
        win->field = dev->overlay_cap_field;
        win->clipcount = dev->clipcount_cap;
        if (clipcount > dev->clipcount_cap)
                clipcount = dev->clipcount_cap;
        if (dev->bitmap_cap == NULL)
                win->bitmap = NULL;
        else if (win->bitmap) {
                if (copy_to_user(win->bitmap, dev->bitmap_cap,
                    ((compose->width + 7) / 8) * compose->height))
                        return -EFAULT;
        }
        if (clipcount && win->clips)
                memcpy(win->clips, dev->clips_cap,
                       clipcount * sizeof(dev->clips_cap[0]));
        return 0;
}

int vidioc_try_fmt_vid_overlay(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct v4l2_rect *compose = &dev->compose_cap;
        struct v4l2_window *win = &f->fmt.win;
        int i, j;

        if (dev->multiplanar)
                return -ENOTTY;

        win->w.left = clamp_t(int, win->w.left,
                              -dev->fb_cap.fmt.width, dev->fb_cap.fmt.width);
        win->w.top = clamp_t(int, win->w.top,
                             -dev->fb_cap.fmt.height, dev->fb_cap.fmt.height);
        win->w.width = compose->width;
        win->w.height = compose->height;
        if (win->field != V4L2_FIELD_BOTTOM && win->field != V4L2_FIELD_TOP)
                win->field = V4L2_FIELD_ANY;
        win->chromakey = 0;
        win->global_alpha = 0;
        if (win->clipcount && !win->clips)
                win->clipcount = 0;
        if (win->clipcount > MAX_CLIPS)
                win->clipcount = MAX_CLIPS;
        if (win->clipcount) {
                memcpy(dev->try_clips_cap, win->clips,
                       win->clipcount * sizeof(dev->clips_cap[0]));
                for (i = 0; i < win->clipcount; i++) {
                        struct v4l2_rect *r = &dev->try_clips_cap[i].c;

                        r->top = clamp_t(s32, r->top, 0, dev->fb_cap.fmt.height - 1);
                        r->height = clamp_t(s32, r->height, 1, dev->fb_cap.fmt.height - r->top);
                        r->left = clamp_t(u32, r->left, 0, dev->fb_cap.fmt.width - 1);
                        r->width = clamp_t(u32, r->width, 1, dev->fb_cap.fmt.width - r->left);
                }
                /*
                 * Yeah, so sue me, it's an O(n^2) algorithm. But n is a small
                 * number and it's typically a one-time deal.
                 */
                for (i = 0; i < win->clipcount - 1; i++) {
                        struct v4l2_rect *r1 = &dev->try_clips_cap[i].c;

                        for (j = i + 1; j < win->clipcount; j++) {
                                struct v4l2_rect *r2 = &dev->try_clips_cap[j].c;

                                if (v4l2_rect_overlap(r1, r2))
                                        return -EINVAL;
                        }
                }
                memcpy(win->clips, dev->try_clips_cap,
                       win->clipcount * sizeof(dev->clips_cap[0]));
        }
        return 0;
}

int vidioc_s_fmt_vid_overlay(struct file *file, void *priv,
                                        struct v4l2_format *f)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct v4l2_rect *compose = &dev->compose_cap;
        struct v4l2_window *win = &f->fmt.win;
        int ret = vidioc_try_fmt_vid_overlay(file, priv, f);
        unsigned bitmap_size = ((compose->width + 7) / 8) * compose->height;
        unsigned clips_size = win->clipcount * sizeof(dev->clips_cap[0]);
        void *new_bitmap = NULL;

        if (ret)
                return ret;

        if (win->bitmap) {
                new_bitmap = vzalloc(bitmap_size);

                if (new_bitmap == NULL)
                        return -ENOMEM;
                if (copy_from_user(new_bitmap, win->bitmap, bitmap_size)) {
                        vfree(new_bitmap);
                        return -EFAULT;
                }
        }

        dev->overlay_cap_top = win->w.top;
        dev->overlay_cap_left = win->w.left;
        dev->overlay_cap_field = win->field;
        vfree(dev->bitmap_cap);
        dev->bitmap_cap = new_bitmap;
        dev->clipcount_cap = win->clipcount;
        if (dev->clipcount_cap)
                memcpy(dev->clips_cap, dev->try_clips_cap, clips_size);
        return 0;
}

int vivid_vid_cap_overlay(struct file *file, void *fh, unsigned i)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (dev->multiplanar)
                return -ENOTTY;

        if (i && dev->fb_vbase_cap == NULL)
                return -EINVAL;

        if (i && dev->fb_cap.fmt.pixelformat != dev->fmt_cap->fourcc) {
                dprintk(dev, 1, "mismatch between overlay and video capture pixelformats\n");
                return -EINVAL;
        }

        if (dev->overlay_cap_owner && dev->overlay_cap_owner != fh)
                return -EBUSY;
        dev->overlay_cap_owner = i ? fh : NULL;
        return 0;
}

int vivid_vid_cap_g_fbuf(struct file *file, void *fh,
                                struct v4l2_framebuffer *a)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (dev->multiplanar)
                return -ENOTTY;

        *a = dev->fb_cap;
        a->capability = V4L2_FBUF_CAP_BITMAP_CLIPPING |
                        V4L2_FBUF_CAP_LIST_CLIPPING;
        a->flags = V4L2_FBUF_FLAG_PRIMARY;
        a->fmt.field = V4L2_FIELD_NONE;
        a->fmt.colorspace = V4L2_COLORSPACE_SRGB;
        a->fmt.priv = 0;
        return 0;
}

int vivid_vid_cap_s_fbuf(struct file *file, void *fh,
                                const struct v4l2_framebuffer *a)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct vivid_fmt *fmt;

        if (dev->multiplanar)
                return -ENOTTY;

        if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
                return -EPERM;

        if (dev->overlay_cap_owner)
                return -EBUSY;

        if (a->base == NULL) {
                dev->fb_cap.base = NULL;
                dev->fb_vbase_cap = NULL;
                return 0;
        }

        if (a->fmt.width < 48 || a->fmt.height < 32)
                return -EINVAL;
        fmt = vivid_get_format(dev, a->fmt.pixelformat);
        if (!fmt || !fmt->can_do_overlay)
                return -EINVAL;
        if (a->fmt.bytesperline < (a->fmt.width * fmt->bit_depth[0]) / 8)
                return -EINVAL;
        if (a->fmt.height * a->fmt.bytesperline < a->fmt.sizeimage)
                return -EINVAL;

        dev->fb_vbase_cap = phys_to_virt((unsigned long)a->base);
        dev->fb_cap = *a;
        dev->overlay_cap_left = clamp_t(int, dev->overlay_cap_left,
                                    -dev->fb_cap.fmt.width, dev->fb_cap.fmt.width);
        dev->overlay_cap_top = clamp_t(int, dev->overlay_cap_top,
                                   -dev->fb_cap.fmt.height, dev->fb_cap.fmt.height);
        return 0;
}

static const struct v4l2_audio vivid_audio_inputs[] = {
        { 0, "TV", V4L2_AUDCAP_STEREO },
        { 1, "Line-In", V4L2_AUDCAP_STEREO },
};

int vidioc_enum_input(struct file *file, void *priv,
                                struct v4l2_input *inp)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (inp->index >= dev->num_inputs)
                return -EINVAL;

        inp->type = V4L2_INPUT_TYPE_CAMERA;
        switch (dev->input_type[inp->index]) {
        case WEBCAM:
                snprintf(inp->name, sizeof(inp->name), "Webcam %u",
                                dev->input_name_counter[inp->index]);
                inp->capabilities = 0;
                break;
        case TV:
                snprintf(inp->name, sizeof(inp->name), "TV %u",
                                dev->input_name_counter[inp->index]);
                inp->type = V4L2_INPUT_TYPE_TUNER;
                inp->std = V4L2_STD_ALL;
                if (dev->has_audio_inputs)
                        inp->audioset = (1 << ARRAY_SIZE(vivid_audio_inputs)) - 1;
                inp->capabilities = V4L2_IN_CAP_STD;
                break;
        case SVID:
                snprintf(inp->name, sizeof(inp->name), "S-Video %u",
                                dev->input_name_counter[inp->index]);
                inp->std = V4L2_STD_ALL;
                if (dev->has_audio_inputs)
                        inp->audioset = (1 << ARRAY_SIZE(vivid_audio_inputs)) - 1;
                inp->capabilities = V4L2_IN_CAP_STD;
                break;
        case HDMI:
                snprintf(inp->name, sizeof(inp->name), "HDMI %u",
                                dev->input_name_counter[inp->index]);
                inp->capabilities = V4L2_IN_CAP_DV_TIMINGS;
                if (dev->edid_blocks == 0 ||
                    dev->dv_timings_signal_mode[dev->input] == NO_SIGNAL)
                        inp->status |= V4L2_IN_ST_NO_SIGNAL;
                else if (dev->dv_timings_signal_mode[dev->input] == NO_LOCK ||
                         dev->dv_timings_signal_mode[dev->input] == OUT_OF_RANGE)
                        inp->status |= V4L2_IN_ST_NO_H_LOCK;
                break;
        }
        if (dev->sensor_hflip)
                inp->status |= V4L2_IN_ST_HFLIP;
        if (dev->sensor_vflip)
                inp->status |= V4L2_IN_ST_VFLIP;
        if (dev->input == inp->index && vivid_is_sdtv_cap(dev)) {
                if (dev->std_signal_mode[dev->input] == NO_SIGNAL) {
                        inp->status |= V4L2_IN_ST_NO_SIGNAL;
                } else if (dev->std_signal_mode[dev->input] == NO_LOCK) {
                        inp->status |= V4L2_IN_ST_NO_H_LOCK;
                } else if (vivid_is_tv_cap(dev)) {
                        switch (tpg_g_quality(&dev->tpg)) {
                        case TPG_QUAL_GRAY:
                                inp->status |= V4L2_IN_ST_COLOR_KILL;
                                break;
                        case TPG_QUAL_NOISE:
                                inp->status |= V4L2_IN_ST_NO_H_LOCK;
                                break;
                        default:
                                break;
                        }
                }
        }
        return 0;
}

int vidioc_g_input(struct file *file, void *priv, unsigned *i)
{
        struct vivid_dev *dev = video_drvdata(file);

        *i = dev->input;
        return 0;
}

int vidioc_s_input(struct file *file, void *priv, unsigned i)
{
        struct vivid_dev *dev = video_drvdata(file);
        struct v4l2_bt_timings *bt = &dev->dv_timings_cap[dev->input].bt;
        unsigned brightness;

        if (i >= dev->num_inputs)
                return -EINVAL;

        if (i == dev->input)
                return 0;

        if (vb2_is_busy(&dev->vb_vid_cap_q) ||
            vb2_is_busy(&dev->vb_vbi_cap_q) ||
            vb2_is_busy(&dev->vb_meta_cap_q))
                return -EBUSY;

        dev->input = i;
        dev->vid_cap_dev.tvnorms = 0;
        if (dev->input_type[i] == TV || dev->input_type[i] == SVID) {
                dev->tv_audio_input = (dev->input_type[i] == TV) ? 0 : 1;
                dev->vid_cap_dev.tvnorms = V4L2_STD_ALL;
        }
        dev->vbi_cap_dev.tvnorms = dev->vid_cap_dev.tvnorms;
        dev->meta_cap_dev.tvnorms = dev->vid_cap_dev.tvnorms;
        vivid_update_format_cap(dev, false);

        if (dev->colorspace) {
                switch (dev->input_type[i]) {
                case WEBCAM:
                        v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_SRGB);
                        break;
                case TV:
                case SVID:
                        v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_170M);
                        break;
                case HDMI:
                        if (bt->flags & V4L2_DV_FL_IS_CE_VIDEO) {
                                if (dev->src_rect.width == 720 && dev->src_rect.height <= 576)
                                        v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_170M);
                                else
                                        v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_709);
                        } else {
                                v4l2_ctrl_s_ctrl(dev->colorspace, VIVID_CS_SRGB);
                        }
                        break;
                }
        }

        /*
         * Modify the brightness range depending on the input.
         * This makes it easy to use vivid to test if applications can
         * handle control range modifications and is also how this is
         * typically used in practice as different inputs may be hooked
         * up to different receivers with different control ranges.
         */
        brightness = 128 * i + dev->input_brightness[i];
        v4l2_ctrl_modify_range(dev->brightness,
                        128 * i, 255 + 128 * i, 1, 128 + 128 * i);
        v4l2_ctrl_s_ctrl(dev->brightness, brightness);

        /* Restore per-input states. */
        v4l2_ctrl_activate(dev->ctrl_dv_timings_signal_mode,
                           vivid_is_hdmi_cap(dev));
        v4l2_ctrl_activate(dev->ctrl_dv_timings, vivid_is_hdmi_cap(dev) &&
                           dev->dv_timings_signal_mode[dev->input] ==
                           SELECTED_DV_TIMINGS);
        v4l2_ctrl_activate(dev->ctrl_std_signal_mode, vivid_is_sdtv_cap(dev));
        v4l2_ctrl_activate(dev->ctrl_standard, vivid_is_sdtv_cap(dev) &&
                           dev->std_signal_mode[dev->input]);

        if (vivid_is_hdmi_cap(dev)) {
                v4l2_ctrl_s_ctrl(dev->ctrl_dv_timings_signal_mode,
                                 dev->dv_timings_signal_mode[dev->input]);
                v4l2_ctrl_s_ctrl(dev->ctrl_dv_timings,
                                 dev->query_dv_timings[dev->input]);
        } else if (vivid_is_sdtv_cap(dev)) {
                v4l2_ctrl_s_ctrl(dev->ctrl_std_signal_mode,
                                 dev->std_signal_mode[dev->input]);
                v4l2_ctrl_s_ctrl(dev->ctrl_standard,
                                 dev->std_signal_mode[dev->input]);
        }

        return 0;
}

int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *vin)
{
        if (vin->index >= ARRAY_SIZE(vivid_audio_inputs))
                return -EINVAL;
        *vin = vivid_audio_inputs[vin->index];
        return 0;
}

int vidioc_g_audio(struct file *file, void *fh, struct v4l2_audio *vin)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!vivid_is_sdtv_cap(dev))
                return -EINVAL;
        *vin = vivid_audio_inputs[dev->tv_audio_input];
        return 0;
}

int vidioc_s_audio(struct file *file, void *fh, const struct v4l2_audio *vin)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!vivid_is_sdtv_cap(dev))
                return -EINVAL;
        if (vin->index >= ARRAY_SIZE(vivid_audio_inputs))
                return -EINVAL;
        dev->tv_audio_input = vin->index;
        return 0;
}

int vivid_video_g_frequency(struct file *file, void *fh, struct v4l2_frequency *vf)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (vf->tuner != 0)
                return -EINVAL;
        vf->frequency = dev->tv_freq;
        return 0;
}

int vivid_video_s_frequency(struct file *file, void *fh, const struct v4l2_frequency *vf)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (vf->tuner != 0)
                return -EINVAL;
        dev->tv_freq = clamp_t(unsigned, vf->frequency, MIN_TV_FREQ, MAX_TV_FREQ);
        if (vivid_is_tv_cap(dev))
                vivid_update_quality(dev);
        return 0;
}

int vivid_video_s_tuner(struct file *file, void *fh, const struct v4l2_tuner *vt)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (vt->index != 0)
                return -EINVAL;
        if (vt->audmode > V4L2_TUNER_MODE_LANG1_LANG2)
                return -EINVAL;
        dev->tv_audmode = vt->audmode;
        return 0;
}

int vivid_video_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
{
        struct vivid_dev *dev = video_drvdata(file);
        enum tpg_quality qual;

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

        vt->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO |
                         V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
        vt->audmode = dev->tv_audmode;
        vt->rangelow = MIN_TV_FREQ;
        vt->rangehigh = MAX_TV_FREQ;
        qual = vivid_get_quality(dev, &vt->afc);
        if (qual == TPG_QUAL_COLOR)
                vt->signal = 0xffff;
        else if (qual == TPG_QUAL_GRAY)
                vt->signal = 0x8000;
        else
                vt->signal = 0;
        if (qual == TPG_QUAL_NOISE) {
                vt->rxsubchans = 0;
        } else if (qual == TPG_QUAL_GRAY) {
                vt->rxsubchans = V4L2_TUNER_SUB_MONO;
        } else {
                unsigned int channel_nr = dev->tv_freq / (6 * 16);
                unsigned int options =
                        (dev->std_cap[dev->input] & V4L2_STD_NTSC_M) ? 4 : 3;

                switch (channel_nr % options) {
                case 0:
                        vt->rxsubchans = V4L2_TUNER_SUB_MONO;
                        break;
                case 1:
                        vt->rxsubchans = V4L2_TUNER_SUB_STEREO;
                        break;
                case 2:
                        if (dev->std_cap[dev->input] & V4L2_STD_NTSC_M)
                                vt->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_SAP;
                        else
                                vt->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
                        break;
                case 3:
                        vt->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_SAP;
                        break;
                }
        }
        strscpy(vt->name, "TV Tuner", sizeof(vt->name));
        return 0;
}

/* Must remain in sync with the vivid_ctrl_standard_strings array */
const v4l2_std_id vivid_standard[] = {
        V4L2_STD_NTSC_M,
        V4L2_STD_NTSC_M_JP,
        V4L2_STD_NTSC_M_KR,
        V4L2_STD_NTSC_443,
        V4L2_STD_PAL_BG | V4L2_STD_PAL_H,
        V4L2_STD_PAL_I,
        V4L2_STD_PAL_DK,
        V4L2_STD_PAL_M,
        V4L2_STD_PAL_N,
        V4L2_STD_PAL_Nc,
        V4L2_STD_PAL_60,
        V4L2_STD_SECAM_B | V4L2_STD_SECAM_G | V4L2_STD_SECAM_H,
        V4L2_STD_SECAM_DK,
        V4L2_STD_SECAM_L,
        V4L2_STD_SECAM_LC,
        V4L2_STD_UNKNOWN
};

/* Must remain in sync with the vivid_standard array */
const char * const vivid_ctrl_standard_strings[] = {
        "NTSC-M",
        "NTSC-M-JP",
        "NTSC-M-KR",
        "NTSC-443",
        "PAL-BGH",
        "PAL-I",
        "PAL-DK",
        "PAL-M",
        "PAL-N",
        "PAL-Nc",
        "PAL-60",
        "SECAM-BGH",
        "SECAM-DK",
        "SECAM-L",
        "SECAM-Lc",
        NULL,
};

int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *id)
{
        struct vivid_dev *dev = video_drvdata(file);
        unsigned int last = dev->query_std_last[dev->input];

        if (!vivid_is_sdtv_cap(dev))
                return -ENODATA;
        if (dev->std_signal_mode[dev->input] == NO_SIGNAL ||
            dev->std_signal_mode[dev->input] == NO_LOCK) {
                *id = V4L2_STD_UNKNOWN;
                return 0;
        }
        if (vivid_is_tv_cap(dev) && tpg_g_quality(&dev->tpg) == TPG_QUAL_NOISE) {
                *id = V4L2_STD_UNKNOWN;
        } else if (dev->std_signal_mode[dev->input] == CURRENT_STD) {
                *id = dev->std_cap[dev->input];
        } else if (dev->std_signal_mode[dev->input] == SELECTED_STD) {
                *id = dev->query_std[dev->input];
        } else {
                *id = vivid_standard[last];
                dev->query_std_last[dev->input] =
                        (last + 1) % ARRAY_SIZE(vivid_standard);
        }

        return 0;
}

int vivid_vid_cap_s_std(struct file *file, void *priv, v4l2_std_id id)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!vivid_is_sdtv_cap(dev))
                return -ENODATA;
        if (dev->std_cap[dev->input] == id)
                return 0;
        if (vb2_is_busy(&dev->vb_vid_cap_q) || vb2_is_busy(&dev->vb_vbi_cap_q))
                return -EBUSY;
        dev->std_cap[dev->input] = id;
        vivid_update_format_cap(dev, false);
        return 0;
}

static void find_aspect_ratio(u32 width, u32 height,
                               u32 *num, u32 *denom)
{
        if (!(height % 3) && ((height * 4 / 3) == width)) {
                *num = 4;
                *denom = 3;
        } else if (!(height % 9) && ((height * 16 / 9) == width)) {
                *num = 16;
                *denom = 9;
        } else if (!(height % 10) && ((height * 16 / 10) == width)) {
                *num = 16;
                *denom = 10;
        } else if (!(height % 4) && ((height * 5 / 4) == width)) {
                *num = 5;
                *denom = 4;
        } else if (!(height % 9) && ((height * 15 / 9) == width)) {
                *num = 15;
                *denom = 9;
        } else { /* default to 16:9 */
                *num = 16;
                *denom = 9;
        }
}

static bool valid_cvt_gtf_timings(struct v4l2_dv_timings *timings)
{
        struct v4l2_bt_timings *bt = &timings->bt;
        u32 total_h_pixel;
        u32 total_v_lines;
        u32 h_freq;

        if (!v4l2_valid_dv_timings(timings, &vivid_dv_timings_cap,
                                NULL, NULL))
                return false;

        total_h_pixel = V4L2_DV_BT_FRAME_WIDTH(bt);
        total_v_lines = V4L2_DV_BT_FRAME_HEIGHT(bt);

        h_freq = (u32)bt->pixelclock / total_h_pixel;

        if (bt->standards == 0 || (bt->standards & V4L2_DV_BT_STD_CVT)) {
                if (v4l2_detect_cvt(total_v_lines, h_freq, bt->vsync, bt->width,
                                    bt->polarities, bt->interlaced, timings))
                        return true;
        }

        if (bt->standards == 0 || (bt->standards & V4L2_DV_BT_STD_GTF)) {
                struct v4l2_fract aspect_ratio;

                find_aspect_ratio(bt->width, bt->height,
                                  &aspect_ratio.numerator,
                                  &aspect_ratio.denominator);
                if (v4l2_detect_gtf(total_v_lines, h_freq, bt->vsync,
                                    bt->polarities, bt->interlaced,
                                    aspect_ratio, timings))
                        return true;
        }
        return false;
}

int vivid_vid_cap_s_dv_timings(struct file *file, void *_fh,
                                    struct v4l2_dv_timings *timings)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!vivid_is_hdmi_cap(dev))
                return -ENODATA;
        if (!v4l2_find_dv_timings_cap(timings, &vivid_dv_timings_cap,
                                      0, NULL, NULL) &&
            !valid_cvt_gtf_timings(timings))
                return -EINVAL;

        if (v4l2_match_dv_timings(timings, &dev->dv_timings_cap[dev->input],
                                  0, false))
                return 0;
        if (vb2_is_busy(&dev->vb_vid_cap_q))
                return -EBUSY;

        dev->dv_timings_cap[dev->input] = *timings;
        vivid_update_format_cap(dev, false);
        return 0;
}

int vidioc_query_dv_timings(struct file *file, void *_fh,
                                    struct v4l2_dv_timings *timings)
{
        struct vivid_dev *dev = video_drvdata(file);
        unsigned int input = dev->input;
        unsigned int last = dev->query_dv_timings_last[input];

        if (!vivid_is_hdmi_cap(dev))
                return -ENODATA;
        if (dev->dv_timings_signal_mode[input] == NO_SIGNAL ||
            dev->edid_blocks == 0)
                return -ENOLINK;
        if (dev->dv_timings_signal_mode[input] == NO_LOCK)
                return -ENOLCK;
        if (dev->dv_timings_signal_mode[input] == OUT_OF_RANGE) {
                timings->bt.pixelclock = vivid_dv_timings_cap.bt.max_pixelclock * 2;
                return -ERANGE;
        }
        if (dev->dv_timings_signal_mode[input] == CURRENT_DV_TIMINGS) {
                *timings = dev->dv_timings_cap[input];
        } else if (dev->dv_timings_signal_mode[input] ==
                   SELECTED_DV_TIMINGS) {
                *timings =
                        v4l2_dv_timings_presets[dev->query_dv_timings[input]];
        } else {
                *timings =
                        v4l2_dv_timings_presets[last];
                dev->query_dv_timings_last[input] =
                        (last + 1) % dev->query_dv_timings_size;
        }
        return 0;
}

int vidioc_s_edid(struct file *file, void *_fh,
                         struct v4l2_edid *edid)
{
        struct vivid_dev *dev = video_drvdata(file);
        u16 phys_addr;
        u32 display_present = 0;
        unsigned int i, j;
        int ret;

        memset(edid->reserved, 0, sizeof(edid->reserved));
        if (edid->pad >= dev->num_inputs)
                return -EINVAL;
        if (dev->input_type[edid->pad] != HDMI || edid->start_block)
                return -EINVAL;
        if (edid->blocks == 0) {
                dev->edid_blocks = 0;
                v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, 0);
                v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, 0);
                phys_addr = CEC_PHYS_ADDR_INVALID;
                goto set_phys_addr;
        }
        if (edid->blocks > dev->edid_max_blocks) {
                edid->blocks = dev->edid_max_blocks;
                return -E2BIG;
        }
        phys_addr = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, NULL);
        ret = v4l2_phys_addr_validate(phys_addr, &phys_addr, NULL);
        if (ret)
                return ret;

        if (vb2_is_busy(&dev->vb_vid_cap_q))
                return -EBUSY;

        dev->edid_blocks = edid->blocks;
        memcpy(dev->edid, edid->edid, edid->blocks * 128);

        for (i = 0, j = 0; i < dev->num_outputs; i++)
                if (dev->output_type[i] == HDMI)
                        display_present |=
                                dev->display_present[i] << j++;

        v4l2_ctrl_s_ctrl(dev->ctrl_tx_edid_present, display_present);
        v4l2_ctrl_s_ctrl(dev->ctrl_tx_hotplug, display_present);

set_phys_addr:
        /* TODO: a proper hotplug detect cycle should be emulated here */
        cec_s_phys_addr(dev->cec_rx_adap, phys_addr, false);

        for (i = 0; i < MAX_OUTPUTS && dev->cec_tx_adap[i]; i++)
                cec_s_phys_addr(dev->cec_tx_adap[i],
                                dev->display_present[i] ?
                                v4l2_phys_addr_for_input(phys_addr, i + 1) :
                                CEC_PHYS_ADDR_INVALID,
                                false);
        return 0;
}

int vidioc_enum_framesizes(struct file *file, void *fh,
                                         struct v4l2_frmsizeenum *fsize)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (!vivid_is_webcam(dev) && !dev->has_scaler_cap)
                return -EINVAL;
        if (vivid_get_format(dev, fsize->pixel_format) == NULL)
                return -EINVAL;
        if (vivid_is_webcam(dev)) {
                if (fsize->index >= ARRAY_SIZE(webcam_sizes))
                        return -EINVAL;
                fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
                fsize->discrete = webcam_sizes[fsize->index];
                return 0;
        }
        if (fsize->index)
                return -EINVAL;
        fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
        fsize->stepwise.min_width = MIN_WIDTH;
        fsize->stepwise.max_width = MAX_WIDTH * MAX_ZOOM;
        fsize->stepwise.step_width = 2;
        fsize->stepwise.min_height = MIN_HEIGHT;
        fsize->stepwise.max_height = MAX_HEIGHT * MAX_ZOOM;
        fsize->stepwise.step_height = 2;
        return 0;
}

/* timeperframe is arbitrary and continuous */
int vidioc_enum_frameintervals(struct file *file, void *priv,
                                             struct v4l2_frmivalenum *fival)
{
        struct vivid_dev *dev = video_drvdata(file);
        const struct vivid_fmt *fmt;
        int i;

        fmt = vivid_get_format(dev, fival->pixel_format);
        if (!fmt)
                return -EINVAL;

        if (!vivid_is_webcam(dev)) {
                if (fival->index)
                        return -EINVAL;
                if (fival->width < MIN_WIDTH || fival->width > MAX_WIDTH * MAX_ZOOM)
                        return -EINVAL;
                if (fival->height < MIN_HEIGHT || fival->height > MAX_HEIGHT * MAX_ZOOM)
                        return -EINVAL;
                fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
                fival->discrete = dev->timeperframe_vid_cap;
                return 0;
        }

        for (i = 0; i < ARRAY_SIZE(webcam_sizes); i++)
                if (fival->width == webcam_sizes[i].width &&
                    fival->height == webcam_sizes[i].height)
                        break;
        if (i == ARRAY_SIZE(webcam_sizes))
                return -EINVAL;
        if (fival->index >= 2 * (VIVID_WEBCAM_SIZES - i))
                return -EINVAL;
        fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
        fival->discrete = webcam_intervals[fival->index];
        return 0;
}

int vivid_vid_cap_g_parm(struct file *file, void *priv,
                          struct v4l2_streamparm *parm)
{
        struct vivid_dev *dev = video_drvdata(file);

        if (parm->type != (dev->multiplanar ?
                           V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
                           V4L2_BUF_TYPE_VIDEO_CAPTURE))
                return -EINVAL;

        parm->parm.capture.capability   = V4L2_CAP_TIMEPERFRAME;
        parm->parm.capture.timeperframe = dev->timeperframe_vid_cap;
        parm->parm.capture.readbuffers  = 1;
        return 0;
}

int vivid_vid_cap_s_parm(struct file *file, void *priv,
                          struct v4l2_streamparm *parm)
{
        struct vivid_dev *dev = video_drvdata(file);
        unsigned ival_sz = 2 * (VIVID_WEBCAM_SIZES - dev->webcam_size_idx);
        struct v4l2_fract tpf;
        unsigned i;

        if (parm->type != (dev->multiplanar ?
                           V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE :
                           V4L2_BUF_TYPE_VIDEO_CAPTURE))
                return -EINVAL;
        if (!vivid_is_webcam(dev))
                return vivid_vid_cap_g_parm(file, priv, parm);

        tpf = parm->parm.capture.timeperframe;

        if (tpf.denominator == 0)
                tpf = webcam_intervals[ival_sz - 1];
        for (i = 0; i < ival_sz; i++)
                if (V4L2_FRACT_COMPARE(tpf, >=, webcam_intervals[i]))
                        break;
        if (i == ival_sz)
                i = ival_sz - 1;
        dev->webcam_ival_idx = i;
        tpf = webcam_intervals[dev->webcam_ival_idx];

        /* resync the thread's timings */
        dev->cap_seq_resync = true;
        dev->timeperframe_vid_cap = tpf;
        parm->parm.capture.capability   = V4L2_CAP_TIMEPERFRAME;
        parm->parm.capture.timeperframe = tpf;
        parm->parm.capture.readbuffers  = 1;
        return 0;
}