// SPDX-License-Identifier: GPL-2.0
/*
 * camss-vfe-gen1.c
 *
 * Qualcomm MSM Camera Subsystem - VFE Common functionality for Gen 1 versions of hw (4.1, 4.7..)
 *
 * Copyright (C) 2020 Linaro Ltd.
 */

#include "camss.h"
#include "camss-vfe.h"
#include "camss-vfe-gen1.h"

/* Max number of frame drop updates per frame */
#define VFE_FRAME_DROP_UPDATES 2
#define VFE_NEXT_SOF_MS 500

int vfe_gen1_halt(struct vfe_device *vfe)
{
        unsigned long time;

        reinit_completion(&vfe->halt_complete);

        vfe->ops_gen1->halt_request(vfe);

        time = wait_for_completion_timeout(&vfe->halt_complete,
                                           msecs_to_jiffies(VFE_HALT_TIMEOUT_MS));
        if (!time) {
                dev_err(vfe->camss->dev, "VFE halt timeout\n");
                return -EIO;
        }

        return 0;
}

static int vfe_disable_output(struct vfe_line *line)
{
        struct vfe_device *vfe = to_vfe(line);
        struct vfe_output *output = &line->output;
        const struct vfe_hw_ops *ops = vfe->res->hw_ops;
        unsigned long flags;
        unsigned long time;
        unsigned int i;

        spin_lock_irqsave(&vfe->output_lock, flags);

        output->gen1.wait_sof = 1;
        spin_unlock_irqrestore(&vfe->output_lock, flags);

        time = wait_for_completion_timeout(&output->sof, msecs_to_jiffies(VFE_NEXT_SOF_MS));
        if (!time)
                dev_err(vfe->camss->dev, "VFE sof timeout\n");

        spin_lock_irqsave(&vfe->output_lock, flags);
        for (i = 0; i < output->wm_num; i++)
                vfe->ops_gen1->wm_enable(vfe, output->wm_idx[i], 0);

        ops->reg_update(vfe, line->id);
        output->wait_reg_update = 1;
        spin_unlock_irqrestore(&vfe->output_lock, flags);

        time = wait_for_completion_timeout(&output->reg_update, msecs_to_jiffies(VFE_NEXT_SOF_MS));
        if (!time)
                dev_err(vfe->camss->dev, "VFE reg update timeout\n");

        spin_lock_irqsave(&vfe->output_lock, flags);

        if (line->id != VFE_LINE_PIX) {
                vfe->ops_gen1->wm_frame_based(vfe, output->wm_idx[0], 0);
                vfe->ops_gen1->bus_disconnect_wm_from_rdi(vfe, output->wm_idx[0], line->id);
                vfe->ops_gen1->enable_irq_wm_line(vfe, output->wm_idx[0], line->id, 0);
                vfe->ops_gen1->set_cgc_override(vfe, output->wm_idx[0], 0);
                spin_unlock_irqrestore(&vfe->output_lock, flags);
        } else {
                for (i = 0; i < output->wm_num; i++) {
                        vfe->ops_gen1->wm_line_based(vfe, output->wm_idx[i], NULL, i, 0);
                        vfe->ops_gen1->set_cgc_override(vfe, output->wm_idx[i], 0);
                }

                vfe->ops_gen1->enable_irq_pix_line(vfe, 0, line->id, 0);
                vfe->ops_gen1->set_module_cfg(vfe, 0);
                vfe->ops_gen1->set_realign_cfg(vfe, line, 0);
                vfe->ops_gen1->set_xbar_cfg(vfe, output, 0);
                vfe->ops_gen1->set_camif_cmd(vfe, 0);

                spin_unlock_irqrestore(&vfe->output_lock, flags);

                vfe->ops_gen1->camif_wait_for_stop(vfe, vfe->camss->dev);
        }

        return 0;
}

/*
 * vfe_gen1_disable - Disable streaming on VFE line
 * @line: VFE line
 *
 * Return 0 on success or a negative error code otherwise
 */
int vfe_gen1_disable(struct vfe_line *line)
{
        struct vfe_device *vfe = to_vfe(line);

        vfe_disable_output(line);

        vfe_put_output(line);

        mutex_lock(&vfe->stream_lock);

        if (vfe->stream_count == 1)
                vfe->ops_gen1->bus_enable_wr_if(vfe, 0);

        vfe->stream_count--;

        mutex_unlock(&vfe->stream_lock);

        return 0;
}

static void vfe_output_init_addrs(struct vfe_device *vfe,
                                  struct vfe_output *output, u8 sync,
                                  struct vfe_line *line)
{
        u32 ping_addr;
        u32 pong_addr;
        unsigned int i;

        output->gen1.active_buf = 0;

        for (i = 0; i < output->wm_num; i++) {
                if (output->buf[0])
                        ping_addr = output->buf[0]->addr[i];
                else
                        ping_addr = 0;

                if (output->buf[1])
                        pong_addr = output->buf[1]->addr[i];
                else
                        pong_addr = ping_addr;

                vfe->ops_gen1->wm_set_ping_addr(vfe, output->wm_idx[i], ping_addr);
                vfe->ops_gen1->wm_set_pong_addr(vfe, output->wm_idx[i], pong_addr);
                if (sync)
                        vfe->ops_gen1->bus_reload_wm(vfe, output->wm_idx[i]);
        }
}

static void vfe_output_frame_drop(struct vfe_device *vfe,
                                  struct vfe_output *output,
                                  u32 drop_pattern)
{
        u8 drop_period;
        unsigned int i;

        /* We need to toggle update period to be valid on next frame */
        output->drop_update_idx++;
        output->drop_update_idx %= VFE_FRAME_DROP_UPDATES;
        drop_period = VFE_FRAME_DROP_VAL + output->drop_update_idx;

        for (i = 0; i < output->wm_num; i++) {
                vfe->ops_gen1->wm_set_framedrop_period(vfe, output->wm_idx[i], drop_period);
                vfe->ops_gen1->wm_set_framedrop_pattern(vfe, output->wm_idx[i], drop_pattern);
        }

        vfe->res->hw_ops->reg_update(vfe, container_of(output, struct vfe_line, output)->id);
}

static int vfe_enable_output(struct vfe_line *line)
{
        struct vfe_device *vfe = to_vfe(line);
        struct vfe_output *output = &line->output;
        const struct vfe_hw_ops *ops = vfe->res->hw_ops;
        struct media_pad *sensor_pad;
        unsigned long flags;
        unsigned int frame_skip = 0;
        unsigned int i;
        u16 ub_size;

        ub_size = vfe->ops_gen1->get_ub_size(vfe->id);
        if (!ub_size)
                return -EINVAL;

        sensor_pad = camss_find_sensor_pad(&line->subdev.entity);
        if (sensor_pad) {
                struct v4l2_subdev *subdev =
                        media_entity_to_v4l2_subdev(sensor_pad->entity);

                v4l2_subdev_call(subdev, sensor, g_skip_frames, &frame_skip);
                /* Max frame skip is 29 frames */
                if (frame_skip > VFE_FRAME_DROP_VAL - 1)
                        frame_skip = VFE_FRAME_DROP_VAL - 1;
        }

        spin_lock_irqsave(&vfe->output_lock, flags);

        ops->reg_update_clear(vfe, line->id);

        if (output->state > VFE_OUTPUT_RESERVED) {
                dev_err(vfe->camss->dev, "Output is not in reserved state %d\n", output->state);
                spin_unlock_irqrestore(&vfe->output_lock, flags);
                return -EINVAL;
        }
        output->state = VFE_OUTPUT_IDLE;

        output->buf[0] = vfe_buf_get_pending(output);
        output->buf[1] = vfe_buf_get_pending(output);

        if (!output->buf[0] && output->buf[1]) {
                output->buf[0] = output->buf[1];
                output->buf[1] = NULL;
        }

        if (output->buf[0])
                output->state = VFE_OUTPUT_SINGLE;

        if (output->buf[1])
                output->state = VFE_OUTPUT_CONTINUOUS;

        switch (output->state) {
        case VFE_OUTPUT_SINGLE:
                vfe_output_frame_drop(vfe, output, 1 << frame_skip);
                break;
        case VFE_OUTPUT_CONTINUOUS:
                vfe_output_frame_drop(vfe, output, 3 << frame_skip);
                break;
        default:
                vfe_output_frame_drop(vfe, output, 0);
                break;
        }

        output->sequence = 0;
        output->gen1.wait_sof = 0;
        output->wait_reg_update = 0;
        reinit_completion(&output->sof);
        reinit_completion(&output->reg_update);

        vfe_output_init_addrs(vfe, output, 0, line);

        if (line->id != VFE_LINE_PIX) {
                vfe->ops_gen1->set_cgc_override(vfe, output->wm_idx[0], 1);
                vfe->ops_gen1->enable_irq_wm_line(vfe, output->wm_idx[0], line->id, 1);
                vfe->ops_gen1->bus_connect_wm_to_rdi(vfe, output->wm_idx[0], line->id);
                vfe->ops_gen1->wm_set_subsample(vfe, output->wm_idx[0]);
                vfe->ops_gen1->set_rdi_cid(vfe, line->id, 0);
                vfe->ops_gen1->wm_set_ub_cfg(vfe, output->wm_idx[0],
                                            (ub_size + 1) * output->wm_idx[0], ub_size);
                vfe->ops_gen1->wm_frame_based(vfe, output->wm_idx[0], 1);
                vfe->ops_gen1->wm_enable(vfe, output->wm_idx[0], 1);
                vfe->ops_gen1->bus_reload_wm(vfe, output->wm_idx[0]);
        } else {
                ub_size /= output->wm_num;
                for (i = 0; i < output->wm_num; i++) {
                        vfe->ops_gen1->set_cgc_override(vfe, output->wm_idx[i], 1);
                        vfe->ops_gen1->wm_set_subsample(vfe, output->wm_idx[i]);
                        vfe->ops_gen1->wm_set_ub_cfg(vfe, output->wm_idx[i],
                                                     (ub_size + 1) * output->wm_idx[i], ub_size);
                        vfe->ops_gen1->wm_line_based(vfe, output->wm_idx[i],
                                                     &line->video_out.active_fmt.fmt.pix_mp, i, 1);
                        vfe->ops_gen1->wm_enable(vfe, output->wm_idx[i], 1);
                        vfe->ops_gen1->bus_reload_wm(vfe, output->wm_idx[i]);
                }
                vfe->ops_gen1->enable_irq_pix_line(vfe, 0, line->id, 1);
                vfe->ops_gen1->set_module_cfg(vfe, 1);
                vfe->ops_gen1->set_camif_cfg(vfe, line);
                vfe->ops_gen1->set_realign_cfg(vfe, line, 1);
                vfe->ops_gen1->set_xbar_cfg(vfe, output, 1);
                vfe->ops_gen1->set_demux_cfg(vfe, line);
                vfe->ops_gen1->set_scale_cfg(vfe, line);
                vfe->ops_gen1->set_crop_cfg(vfe, line);
                vfe->ops_gen1->set_clamp_cfg(vfe);
                vfe->ops_gen1->set_camif_cmd(vfe, 1);
        }

        ops->reg_update(vfe, line->id);

        spin_unlock_irqrestore(&vfe->output_lock, flags);

        return 0;
}

static int vfe_get_output(struct vfe_line *line)
{
        struct vfe_device *vfe = to_vfe(line);
        struct vfe_output *output;
        struct v4l2_format *f = &line->video_out.active_fmt;
        unsigned long flags;
        int i;
        int wm_idx;

        spin_lock_irqsave(&vfe->output_lock, flags);

        output = &line->output;
        if (output->state > VFE_OUTPUT_RESERVED) {
                dev_err(vfe->camss->dev, "Output is running\n");
                goto error;
        }
        output->state = VFE_OUTPUT_RESERVED;

        output->gen1.active_buf = 0;

        switch (f->fmt.pix_mp.pixelformat) {
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_NV21:
        case V4L2_PIX_FMT_NV16:
        case V4L2_PIX_FMT_NV61:
                output->wm_num = 2;
                break;
        default:
                output->wm_num = 1;
                break;
        }

        for (i = 0; i < output->wm_num; i++) {
                wm_idx = vfe_reserve_wm(vfe, line->id);
                if (wm_idx < 0) {
                        dev_err(vfe->camss->dev, "Can not reserve wm\n");
                        goto error_get_wm;
                }
                output->wm_idx[i] = wm_idx;
        }

        output->drop_update_idx = 0;

        spin_unlock_irqrestore(&vfe->output_lock, flags);

        return 0;

error_get_wm:
        for (i--; i >= 0; i--)
                vfe_release_wm(vfe, output->wm_idx[i]);
        output->state = VFE_OUTPUT_OFF;
error:
        spin_unlock_irqrestore(&vfe->output_lock, flags);

        return -EINVAL;
}

int vfe_gen1_enable(struct vfe_line *line)
{
        struct vfe_device *vfe = to_vfe(line);
        int ret;

        mutex_lock(&vfe->stream_lock);

        if (!vfe->stream_count) {
                vfe->ops_gen1->enable_irq_common(vfe);
                vfe->ops_gen1->bus_enable_wr_if(vfe, 1);
                vfe->ops_gen1->set_qos(vfe);
                vfe->ops_gen1->set_ds(vfe);
        }

        vfe->stream_count++;

        mutex_unlock(&vfe->stream_lock);

        ret = vfe_get_output(line);
        if (ret < 0)
                goto error_get_output;

        ret = vfe_enable_output(line);
        if (ret < 0)
                goto error_enable_output;

        vfe->was_streaming = 1;

        return 0;

error_enable_output:
        vfe_put_output(line);

error_get_output:
        mutex_lock(&vfe->stream_lock);

        if (vfe->stream_count == 1)
                vfe->ops_gen1->bus_enable_wr_if(vfe, 0);

        vfe->stream_count--;

        mutex_unlock(&vfe->stream_lock);

        return ret;
}

static void vfe_output_update_ping_addr(struct vfe_device *vfe,
                                        struct vfe_output *output, u8 sync,
                                        struct vfe_line *line)
{
        u32 addr;
        unsigned int i;

        for (i = 0; i < output->wm_num; i++) {
                if (output->buf[0])
                        addr = output->buf[0]->addr[i];
                else
                        addr = 0;

                vfe->ops_gen1->wm_set_ping_addr(vfe, output->wm_idx[i], addr);
                if (sync)
                        vfe->ops_gen1->bus_reload_wm(vfe, output->wm_idx[i]);
        }
}

static void vfe_output_update_pong_addr(struct vfe_device *vfe,
                                        struct vfe_output *output, u8 sync,
                                        struct vfe_line *line)
{
        u32 addr;
        unsigned int i;

        for (i = 0; i < output->wm_num; i++) {
                if (output->buf[1])
                        addr = output->buf[1]->addr[i];
                else
                        addr = 0;

                vfe->ops_gen1->wm_set_pong_addr(vfe, output->wm_idx[i], addr);
                if (sync)
                        vfe->ops_gen1->bus_reload_wm(vfe, output->wm_idx[i]);
        }
}

static void vfe_buf_update_wm_on_next(struct vfe_device *vfe,
                                      struct vfe_output *output)
{
        switch (output->state) {
        case VFE_OUTPUT_CONTINUOUS:
                vfe_output_frame_drop(vfe, output, 3);
                break;
        case VFE_OUTPUT_SINGLE:
        default:
                dev_err_ratelimited(vfe->camss->dev,
                                    "Next buf in wrong state! %d\n",
                                    output->state);
                break;
        }
}

static void vfe_buf_update_wm_on_last(struct vfe_device *vfe,
                                      struct vfe_output *output)
{
        switch (output->state) {
        case VFE_OUTPUT_CONTINUOUS:
                output->state = VFE_OUTPUT_SINGLE;
                vfe_output_frame_drop(vfe, output, 1);
                break;
        case VFE_OUTPUT_SINGLE:
                output->state = VFE_OUTPUT_STOPPING;
                vfe_output_frame_drop(vfe, output, 0);
                break;
        default:
                dev_err_ratelimited(vfe->camss->dev,
                                    "Last buff in wrong state! %d\n",
                                    output->state);
                break;
        }
}

static void vfe_buf_update_wm_on_new(struct vfe_device *vfe,
                                     struct vfe_output *output,
                                     struct camss_buffer *new_buf,
                                     struct vfe_line *line)
{
        int inactive_idx;

        switch (output->state) {
        case VFE_OUTPUT_SINGLE:
                inactive_idx = !output->gen1.active_buf;

                if (!output->buf[inactive_idx]) {
                        output->buf[inactive_idx] = new_buf;

                        if (inactive_idx)
                                vfe_output_update_pong_addr(vfe, output, 0, line);
                        else
                                vfe_output_update_ping_addr(vfe, output, 0, line);

                        vfe_output_frame_drop(vfe, output, 3);
                        output->state = VFE_OUTPUT_CONTINUOUS;
                } else {
                        vfe_buf_add_pending(output, new_buf);
                        dev_err_ratelimited(vfe->camss->dev,
                                            "Inactive buffer is busy\n");
                }
                break;

        case VFE_OUTPUT_IDLE:
                if (!output->buf[0]) {
                        output->buf[0] = new_buf;

                        vfe_output_init_addrs(vfe, output, 1, line);
                        vfe_output_frame_drop(vfe, output, 1);

                        output->state = VFE_OUTPUT_SINGLE;
                } else {
                        vfe_buf_add_pending(output, new_buf);
                        dev_err_ratelimited(vfe->camss->dev,
                                            "Output idle with buffer set!\n");
                }
                break;

        case VFE_OUTPUT_CONTINUOUS:
        default:
                vfe_buf_add_pending(output, new_buf);
                break;
        }
}

/*
 * vfe_isr_halt_ack - Process halt ack
 * @vfe: VFE Device
 */
static void vfe_isr_halt_ack(struct vfe_device *vfe)
{
        complete(&vfe->halt_complete);
        vfe->ops_gen1->halt_clear(vfe);
}

/*
 * vfe_isr_sof - Process start of frame interrupt
 * @vfe: VFE Device
 * @line_id: VFE line
 */
static void vfe_isr_sof(struct vfe_device *vfe, enum vfe_line_id line_id)
{
        struct vfe_output *output;
        unsigned long flags;

        spin_lock_irqsave(&vfe->output_lock, flags);
        output = &vfe->line[line_id].output;
        if (output->gen1.wait_sof) {
                output->gen1.wait_sof = 0;
                complete(&output->sof);
        }
        spin_unlock_irqrestore(&vfe->output_lock, flags);
}

/*
 * vfe_isr_reg_update - Process reg update interrupt
 * @vfe: VFE Device
 * @line_id: VFE line
 */
static void vfe_isr_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id)
{
        struct vfe_output *output;
        struct vfe_line *line = &vfe->line[line_id];
        unsigned long flags;

        spin_lock_irqsave(&vfe->output_lock, flags);
        vfe->res->hw_ops->reg_update_clear(vfe, line_id);

        output = &line->output;

        if (output->wait_reg_update) {
                output->wait_reg_update = 0;
                complete(&output->reg_update);
                spin_unlock_irqrestore(&vfe->output_lock, flags);
                return;
        }

        if (output->state == VFE_OUTPUT_STOPPING) {
                /* Release last buffer when hw is idle */
                if (output->last_buffer) {
                        vb2_buffer_done(&output->last_buffer->vb.vb2_buf,
                                        VB2_BUF_STATE_DONE);
                        output->last_buffer = NULL;
                }
                output->state = VFE_OUTPUT_IDLE;

                /* Buffers received in stopping state are queued in */
                /* dma pending queue, start next capture here */

                output->buf[0] = vfe_buf_get_pending(output);
                output->buf[1] = vfe_buf_get_pending(output);

                if (!output->buf[0] && output->buf[1]) {
                        output->buf[0] = output->buf[1];
                        output->buf[1] = NULL;
                }

                if (output->buf[0])
                        output->state = VFE_OUTPUT_SINGLE;

                if (output->buf[1])
                        output->state = VFE_OUTPUT_CONTINUOUS;

                switch (output->state) {
                case VFE_OUTPUT_SINGLE:
                        vfe_output_frame_drop(vfe, output, 2);
                        break;
                case VFE_OUTPUT_CONTINUOUS:
                        vfe_output_frame_drop(vfe, output, 3);
                        break;
                default:
                        vfe_output_frame_drop(vfe, output, 0);
                        break;
                }

                vfe_output_init_addrs(vfe, output, 1, &vfe->line[line_id]);
        }

        spin_unlock_irqrestore(&vfe->output_lock, flags);
}

/*
 * vfe_isr_wm_done - Process write master done interrupt
 * @vfe: VFE Device
 * @wm: Write master id
 */
static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
{
        struct camss_buffer *ready_buf;
        struct vfe_output *output;
        dma_addr_t *new_addr;
        unsigned long flags;
        u32 active_index;
        u64 ts = ktime_get_ns();
        unsigned int i;

        active_index = vfe->ops_gen1->wm_get_ping_pong_status(vfe, wm);

        spin_lock_irqsave(&vfe->output_lock, flags);

        if (vfe->wm_output_map[wm] == VFE_LINE_NONE) {
                dev_err_ratelimited(vfe->camss->dev,
                                    "Received wm done for unmapped index\n");
                goto out_unlock;
        }
        output = &vfe->line[vfe->wm_output_map[wm]].output;

        if (output->gen1.active_buf == active_index && 0) {
                dev_err_ratelimited(vfe->camss->dev,
                                    "Active buffer mismatch!\n");
                goto out_unlock;
        }
        output->gen1.active_buf = active_index;

        ready_buf = output->buf[!active_index];
        if (!ready_buf) {
                dev_err_ratelimited(vfe->camss->dev,
                                    "Missing ready buf %d %d!\n",
                                    !active_index, output->state);
                goto out_unlock;
        }

        ready_buf->vb.vb2_buf.timestamp = ts;
        ready_buf->vb.sequence = output->sequence++;

        /* Get next buffer */
        output->buf[!active_index] = vfe_buf_get_pending(output);
        if (!output->buf[!active_index]) {
                /* No next buffer - set same address */
                new_addr = ready_buf->addr;
                vfe_buf_update_wm_on_last(vfe, output);
        } else {
                new_addr = output->buf[!active_index]->addr;
                vfe_buf_update_wm_on_next(vfe, output);
        }

        if (active_index)
                for (i = 0; i < output->wm_num; i++)
                        vfe->ops_gen1->wm_set_ping_addr(vfe, output->wm_idx[i], new_addr[i]);
        else
                for (i = 0; i < output->wm_num; i++)
                        vfe->ops_gen1->wm_set_pong_addr(vfe, output->wm_idx[i], new_addr[i]);

        spin_unlock_irqrestore(&vfe->output_lock, flags);

        if (output->state == VFE_OUTPUT_STOPPING)
                output->last_buffer = ready_buf;
        else
                vb2_buffer_done(&ready_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);

        return;

out_unlock:
        spin_unlock_irqrestore(&vfe->output_lock, flags);
}

/*
 * vfe_queue_buffer - Add empty buffer
 * @vid: Video device structure
 * @buf: Buffer to be enqueued
 *
 * Add an empty buffer - depending on the current number of buffers it will be
 * put in pending buffer queue or directly given to the hardware to be filled.
 *
 * Return 0 on success or a negative error code otherwise
 */
static int vfe_queue_buffer(struct camss_video *vid, struct camss_buffer *buf)
{
        struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
        struct vfe_device *vfe = to_vfe(line);
        struct vfe_output *output;
        unsigned long flags;

        output = &line->output;

        spin_lock_irqsave(&vfe->output_lock, flags);

        vfe_buf_update_wm_on_new(vfe, output, buf, line);

        spin_unlock_irqrestore(&vfe->output_lock, flags);

        return 0;
}

#define CALC_WORD(width, M, N) (((width) * (M) + (N) - 1) / (N))

int vfe_word_per_line(u32 format, u32 width)
{
        int val = 0;

        switch (format) {
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_NV21:
        case V4L2_PIX_FMT_NV16:
        case V4L2_PIX_FMT_NV61:
                val = CALC_WORD(width, 1, 8);
                break;
        case V4L2_PIX_FMT_YUYV:
        case V4L2_PIX_FMT_YVYU:
        case V4L2_PIX_FMT_UYVY:
        case V4L2_PIX_FMT_VYUY:
                val = CALC_WORD(width, 2, 8);
                break;
        }

        return val;
}

const struct vfe_isr_ops vfe_isr_ops_gen1 = {
        .reset_ack = vfe_isr_reset_ack,
        .halt_ack = vfe_isr_halt_ack,
        .reg_update = vfe_isr_reg_update,
        .sof = vfe_isr_sof,
        .comp_done = vfe_isr_comp_done,
        .wm_done = vfe_isr_wm_done,
};

const struct camss_video_ops vfe_video_ops_gen1 = {
        .queue_buffer = vfe_queue_buffer,
        .flush_buffers = vfe_flush_buffers,
};