s5p_mfc.c

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/*
 * Samsung S5P Multi Format Codec v 5.1
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Kamil Debski, <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-event.h>
#include <linux/workqueue.h>
#include <media/videobuf2-core.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_ctrl.h"
#include "s5p_mfc_debug.h"
#include "s5p_mfc_dec.h"
#include "s5p_mfc_enc.h"
#include "s5p_mfc_intr.h"
#include "s5p_mfc_opr.h"
#include "s5p_mfc_cmd.h"
#include "s5p_mfc_pm.h"

#define S5P_MFC_NAME        "s5p-mfc"
#define S5P_MFC_DEC_NAME    "s5p-mfc-dec"
#define S5P_MFC_ENC_NAME    "s5p-mfc-enc"

int debug;
module_param(debug, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose messages");

/* Helper functions for interrupt processing */

/* Remove from hw execution round robin */
void clear_work_bit(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_dev *dev = ctx->dev;

    spin_lock(&dev->condlock);
    __clear_bit(ctx->num, &dev->ctx_work_bits);
    spin_unlock(&dev->condlock);
}

/* Add to hw execution round robin */
void set_work_bit(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_dev *dev = ctx->dev;

    spin_lock(&dev->condlock);
    __set_bit(ctx->num, &dev->ctx_work_bits);
    spin_unlock(&dev->condlock);
}

/* Remove from hw execution round robin */
void clear_work_bit_irqsave(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    unsigned long flags;

    spin_lock_irqsave(&dev->condlock, flags);
    __clear_bit(ctx->num, &dev->ctx_work_bits);
    spin_unlock_irqrestore(&dev->condlock, flags);
}

/* Add to hw execution round robin */
void set_work_bit_irqsave(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    unsigned long flags;

    spin_lock_irqsave(&dev->condlock, flags);
    __set_bit(ctx->num, &dev->ctx_work_bits);
    spin_unlock_irqrestore(&dev->condlock, flags);
}

/* Wake up context wait_queue */
static void wake_up_ctx(struct s5p_mfc_ctx *ctx, unsigned int reason,
            unsigned int err)
{
    ctx->int_cond = 1;
    ctx->int_type = reason;
    ctx->int_err = err;
    wake_up(&ctx->queue);
}

/* Wake up device wait_queue */
static void wake_up_dev(struct s5p_mfc_dev *dev, unsigned int reason,
            unsigned int err)
{
    dev->int_cond = 1;
    dev->int_type = reason;
    dev->int_err = err;
    wake_up(&dev->queue);
}

static void s5p_mfc_watchdog(unsigned long arg)
{
    struct s5p_mfc_dev *dev = (struct s5p_mfc_dev *)arg;

    if (test_bit(0, &dev->hw_lock))
        atomic_inc(&dev->watchdog_cnt);
    if (atomic_read(&dev->watchdog_cnt) >= MFC_WATCHDOG_CNT) {
        /* This means that hw is busy and no interrupts were
         * generated by hw for the Nth time of running this
         * watchdog timer. This usually means a serious hw
         * error. Now it is time to kill all instances and
         * reset the MFC. */
        mfc_err("Time out during waiting for HW\n");
        queue_work(dev->watchdog_workqueue, &dev->watchdog_work);
    }
    dev->watchdog_timer.expires = jiffies +
                    msecs_to_jiffies(MFC_WATCHDOG_INTERVAL);
    add_timer(&dev->watchdog_timer);
}

static void s5p_mfc_watchdog_worker(struct work_struct *work)
{
    struct s5p_mfc_dev *dev;
    struct s5p_mfc_ctx *ctx;
    unsigned long flags;
    int mutex_locked;
    int i, ret;

    dev = container_of(work, struct s5p_mfc_dev, watchdog_work);

    mfc_err("Driver timeout error handling\n");
    /* Lock the mutex that protects open and release.
     * This is necessary as they may load and unload firmware. */
    mutex_locked = mutex_trylock(&dev->mfc_mutex);
    if (!mutex_locked)
        mfc_err("Error: some instance may be closing/opening\n");
    spin_lock_irqsave(&dev->irqlock, flags);

    s5p_mfc_clock_off();

    for (i = 0; i < MFC_NUM_CONTEXTS; i++) {
        ctx = dev->ctx[i];
        if (!ctx)
            continue;
        ctx->state = MFCINST_ERROR;
        s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->dst_queue,
                &ctx->vq_dst);
        s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->src_queue,
                &ctx->vq_src);
        clear_work_bit(ctx);
        wake_up_ctx(ctx, S5P_MFC_R2H_CMD_ERR_RET, 0);
    }
    clear_bit(0, &dev->hw_lock);
    spin_unlock_irqrestore(&dev->irqlock, flags);
    /* Double check if there is at least one instance running.
     * If no instance is in memory than no firmware should be present */
    if (dev->num_inst > 0) {
        ret = s5p_mfc_reload_firmware(dev);
        if (ret) {
            mfc_err("Failed to reload FW\n");
            goto unlock;
        }
        s5p_mfc_clock_on();
        ret = s5p_mfc_init_hw(dev);
        if (ret)
            mfc_err("Failed to reinit FW\n");
    }
unlock:
    if (mutex_locked)
        mutex_unlock(&dev->mfc_mutex);
}

static enum s5p_mfc_node_type s5p_mfc_get_node_type(struct file *file)
{
    struct video_device *vdev = video_devdata(file);

    if (!vdev) {
        mfc_err("failed to get video_device");
        return MFCNODE_INVALID;
    }
    if (vdev->index == 0)
        return MFCNODE_DECODER;
    else if (vdev->index == 1)
        return MFCNODE_ENCODER;
    return MFCNODE_INVALID;
}

static void s5p_mfc_clear_int_flags(struct s5p_mfc_dev *dev)
{
    mfc_write(dev, 0, S5P_FIMV_RISC_HOST_INT);
    mfc_write(dev, 0, S5P_FIMV_RISC2HOST_CMD);
    mfc_write(dev, 0xffff, S5P_FIMV_SI_RTN_CHID);
}

static void s5p_mfc_handle_frame_all_extracted(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_buf *dst_buf;
    struct s5p_mfc_dev *dev = ctx->dev;

    ctx->state = MFCINST_FINISHED;
    ctx->sequence++;
    while (!list_empty(&ctx->dst_queue)) {
        dst_buf = list_entry(ctx->dst_queue.next,
                     struct s5p_mfc_buf, list);
        mfc_debug(2, "Cleaning up buffer: %d\n",
                      dst_buf->b->v4l2_buf.index);
        vb2_set_plane_payload(dst_buf->b, 0, 0);
        vb2_set_plane_payload(dst_buf->b, 1, 0);
        list_del(&dst_buf->list);
        ctx->dst_queue_cnt--;
        dst_buf->b->v4l2_buf.sequence = (ctx->sequence++);

        if (s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_top, ctx) ==
            s5p_mfc_hw_call(dev->mfc_ops, get_pic_type_bot, ctx))
            dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE;
        else
            dst_buf->b->v4l2_buf.field = V4L2_FIELD_INTERLACED;

        ctx->dec_dst_flag &= ~(1 << dst_buf->b->v4l2_buf.index);
        vb2_buffer_done(dst_buf->b, VB2_BUF_STATE_DONE);
    }
}

static void s5p_mfc_handle_frame_copy_time(struct s5p_mfc_ctx *ctx)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    struct s5p_mfc_buf  *dst_buf, *src_buf;
    size_t dec_y_addr;
    unsigned int frame_type;

    dec_y_addr = s5p_mfc_hw_call(dev->mfc_ops, get_dec_y_adr, dev);
    frame_type = s5p_mfc_hw_call(dev->mfc_ops, get_dec_frame_type, dev);

    /* Copy timestamp / timecode from decoded src to dst and set
       appropraite flags */
    src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list);
    list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
        if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dec_y_addr) {
            memcpy(&dst_buf->b->v4l2_buf.timecode,
                &src_buf->b->v4l2_buf.timecode,
                sizeof(struct v4l2_timecode));
            memcpy(&dst_buf->b->v4l2_buf.timestamp,
                &src_buf->b->v4l2_buf.timestamp,
                sizeof(struct timeval));
            switch (frame_type) {
            case S5P_FIMV_DECODE_FRAME_I_FRAME:
                dst_buf->b->v4l2_buf.flags |=
                        V4L2_BUF_FLAG_KEYFRAME;
                break;
            case S5P_FIMV_DECODE_FRAME_P_FRAME:
                dst_buf->b->v4l2_buf.flags |=
                        V4L2_BUF_FLAG_PFRAME;
                break;
            case S5P_FIMV_DECODE_FRAME_B_FRAME:
                dst_buf->b->v4l2_buf.flags |=
                        V4L2_BUF_FLAG_BFRAME;
                break;
            }
            break;
        }
    }
}

static void s5p_mfc_handle_frame_new(struct s5p_mfc_ctx *ctx, unsigned int err)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    struct s5p_mfc_buf  *dst_buf;
    size_t dspl_y_addr;
    unsigned int frame_type;
    unsigned int index;

    dspl_y_addr = s5p_mfc_hw_call(dev->mfc_ops, get_dspl_y_adr, dev);
    frame_type = s5p_mfc_hw_call(dev->mfc_ops, get_dec_frame_type, dev);

    /* If frame is same as previous then skip and do not dequeue */
    if (frame_type == S5P_FIMV_DECODE_FRAME_SKIPPED) {
        if (!ctx->after_packed_pb)
            ctx->sequence++;
        ctx->after_packed_pb = 0;
        return;
    }
    ctx->sequence++;
    /* The MFC returns address of the buffer, now we have to
     * check which videobuf does it correspond to */
    list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
        /* Check if this is the buffer we're looking for */
        if (vb2_dma_contig_plane_dma_addr(dst_buf->b, 0) == dspl_y_addr) {
            list_del(&dst_buf->list);
            ctx->dst_queue_cnt--;
            dst_buf->b->v4l2_buf.sequence = ctx->sequence;
            if (s5p_mfc_hw_call(dev->mfc_ops,
                    get_pic_type_top, ctx) ==
                s5p_mfc_hw_call(dev->mfc_ops,
                    get_pic_type_bot, ctx))
                dst_buf->b->v4l2_buf.field = V4L2_FIELD_NONE;
            else
                dst_buf->b->v4l2_buf.field =
                            V4L2_FIELD_INTERLACED;
            vb2_set_plane_payload(dst_buf->b, 0, ctx->luma_size);
            vb2_set_plane_payload(dst_buf->b, 1, ctx->chroma_size);
            clear_bit(dst_buf->b->v4l2_buf.index,
                            &ctx->dec_dst_flag);

            vb2_buffer_done(dst_buf->b,
                err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);

            index = dst_buf->b->v4l2_buf.index;
            break;
        }
    }
}

/* Handle frame decoding interrupt */
static void s5p_mfc_handle_frame(struct s5p_mfc_ctx *ctx,
                    unsigned int reason, unsigned int err)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    unsigned int dst_frame_status;
    struct s5p_mfc_buf *src_buf;
    unsigned long flags;
    unsigned int res_change;

    unsigned int index;

    dst_frame_status = s5p_mfc_hw_call(dev->mfc_ops, get_dspl_status, dev)
                & S5P_FIMV_DEC_STATUS_DECODING_STATUS_MASK;
    res_change = (s5p_mfc_hw_call(dev->mfc_ops, get_dspl_status, dev)
                & S5P_FIMV_DEC_STATUS_RESOLUTION_MASK)
                >> S5P_FIMV_DEC_STATUS_RESOLUTION_SHIFT;
    mfc_debug(2, "Frame Status: %x\n", dst_frame_status);
    if (ctx->state == MFCINST_RES_CHANGE_INIT)
        ctx->state = MFCINST_RES_CHANGE_FLUSH;
    if (res_change == S5P_FIMV_RES_INCREASE ||
        res_change == S5P_FIMV_RES_DECREASE) {
        ctx->state = MFCINST_RES_CHANGE_INIT;
        s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
        wake_up_ctx(ctx, reason, err);
        if (test_and_clear_bit(0, &dev->hw_lock) == 0)
            BUG();
        s5p_mfc_clock_off();
        s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
        return;
    }
    if (ctx->dpb_flush_flag)
        ctx->dpb_flush_flag = 0;

    spin_lock_irqsave(&dev->irqlock, flags);
    /* All frames remaining in the buffer have been extracted  */
    if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_EMPTY) {
        if (ctx->state == MFCINST_RES_CHANGE_FLUSH) {
            s5p_mfc_handle_frame_all_extracted(ctx);
            ctx->state = MFCINST_RES_CHANGE_END;
            goto leave_handle_frame;
        } else {
            s5p_mfc_handle_frame_all_extracted(ctx);
        }
    }

    if (dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY ||
        dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_ONLY)
        s5p_mfc_handle_frame_copy_time(ctx);

    /* A frame has been decoded and is in the buffer  */
    if (dst_frame_status == S5P_FIMV_DEC_STATUS_DISPLAY_ONLY ||
        dst_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY) {
        s5p_mfc_handle_frame_new(ctx, err);
    } else {
        mfc_debug(2, "No frame decode\n");
    }
    /* Mark source buffer as complete */
    if (dst_frame_status != S5P_FIMV_DEC_STATUS_DISPLAY_ONLY
        && !list_empty(&ctx->src_queue)) {
        src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf,
                                list);
        ctx->consumed_stream += s5p_mfc_hw_call(dev->mfc_ops,
                        get_consumed_stream, dev);
        if (ctx->codec_mode != S5P_MFC_CODEC_H264_DEC &&
            ctx->consumed_stream + STUFF_BYTE <
            src_buf->b->v4l2_planes[0].bytesused) {
            /* Run MFC again on the same buffer */
            mfc_debug(2, "Running again the same buffer\n");
            ctx->after_packed_pb = 1;
        } else {
            index = src_buf->b->v4l2_buf.index;
            mfc_debug(2, "MFC needs next buffer\n");
            ctx->consumed_stream = 0;
            list_del(&src_buf->list);
            ctx->src_queue_cnt--;
            if (s5p_mfc_hw_call(dev->mfc_ops, err_dec, err) > 0)
                vb2_buffer_done(src_buf->b, VB2_BUF_STATE_ERROR);
            else
                vb2_buffer_done(src_buf->b, VB2_BUF_STATE_DONE);
        }
    }
leave_handle_frame:
    spin_unlock_irqrestore(&dev->irqlock, flags);
    if ((ctx->src_queue_cnt == 0 && ctx->state != MFCINST_FINISHING)
                    || ctx->dst_queue_cnt < ctx->dpb_count)
        clear_work_bit(ctx);
    s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    wake_up_ctx(ctx, reason, err);
    if (test_and_clear_bit(0, &dev->hw_lock) == 0)
        BUG();
    s5p_mfc_clock_off();
    s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
}

/* Error handling for interrupt */
static void s5p_mfc_handle_error(struct s5p_mfc_ctx *ctx,
                 unsigned int reason, unsigned int err)
{
    struct s5p_mfc_dev *dev;
    unsigned long flags;

    /* If no context is available then all necessary
     * processing has been done. */
    if (ctx == NULL)
        return;

    dev = ctx->dev;
    mfc_err("Interrupt Error: %08x\n", err);
    s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    wake_up_dev(dev, reason, err);

    /* Error recovery is dependent on the state of context */
    switch (ctx->state) {
    case MFCINST_INIT:
        /* This error had to happen while acquireing instance */
    case MFCINST_GOT_INST:
        /* This error had to happen while parsing the header */
    case MFCINST_HEAD_PARSED:
        /* This error had to happen while setting dst buffers */
    case MFCINST_RETURN_INST:
        /* This error had to happen while releasing instance */
        clear_work_bit(ctx);
        wake_up_ctx(ctx, reason, err);
        if (test_and_clear_bit(0, &dev->hw_lock) == 0)
            BUG();
        s5p_mfc_clock_off();
        ctx->state = MFCINST_ERROR;
        break;
    case MFCINST_FINISHING:
    case MFCINST_FINISHED:
    case MFCINST_RUNNING:
        /* It is higly probable that an error occured
         * while decoding a frame */
        clear_work_bit(ctx);
        ctx->state = MFCINST_ERROR;
        /* Mark all dst buffers as having an error */
        spin_lock_irqsave(&dev->irqlock, flags);
        s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->dst_queue,
                &ctx->vq_dst);
        /* Mark all src buffers as having an error */
        s5p_mfc_hw_call(dev->mfc_ops, cleanup_queue, &ctx->src_queue,
                &ctx->vq_src);
        spin_unlock_irqrestore(&dev->irqlock, flags);
        if (test_and_clear_bit(0, &dev->hw_lock) == 0)
            BUG();
        s5p_mfc_clock_off();
        break;
    default:
        mfc_err("Encountered an error interrupt which had not been handled\n");
        break;
    }
    return;
}

/* Header parsing interrupt handling */
static void s5p_mfc_handle_seq_done(struct s5p_mfc_ctx *ctx,
                 unsigned int reason, unsigned int err)
{
    struct s5p_mfc_dev *dev;

    if (ctx == NULL)
        return;
    dev = ctx->dev;
    if (ctx->c_ops->post_seq_start) {
        if (ctx->c_ops->post_seq_start(ctx))
            mfc_err("post_seq_start() failed\n");
    } else {
        ctx->img_width = s5p_mfc_hw_call(dev->mfc_ops, get_img_width,
                dev);
        ctx->img_height = s5p_mfc_hw_call(dev->mfc_ops, get_img_height,
                dev);

        s5p_mfc_hw_call(dev->mfc_ops, dec_calc_dpb_size, ctx);

        ctx->dpb_count = s5p_mfc_hw_call(dev->mfc_ops, get_dpb_count,
                dev);
        ctx->mv_count = s5p_mfc_hw_call(dev->mfc_ops, get_mv_count,
                dev);
        if (ctx->img_width == 0 || ctx->img_height == 0)
            ctx->state = MFCINST_ERROR;
        else
            ctx->state = MFCINST_HEAD_PARSED;

        if ((ctx->codec_mode == S5P_MFC_CODEC_H264_DEC ||
            ctx->codec_mode == S5P_MFC_CODEC_H264_MVC_DEC) &&
                !list_empty(&ctx->src_queue)) {
            struct s5p_mfc_buf *src_buf;
            src_buf = list_entry(ctx->src_queue.next,
                    struct s5p_mfc_buf, list);
            if (s5p_mfc_hw_call(dev->mfc_ops, get_consumed_stream,
                        dev) <
                    src_buf->b->v4l2_planes[0].bytesused)
                ctx->head_processed = 0;
            else
                ctx->head_processed = 1;
        } else {
            ctx->head_processed = 1;
        }
    }
    s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    clear_work_bit(ctx);
    if (test_and_clear_bit(0, &dev->hw_lock) == 0)
        BUG();
    s5p_mfc_clock_off();
    s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
    wake_up_ctx(ctx, reason, err);
}

/* Header parsing interrupt handling */
static void s5p_mfc_handle_init_buffers(struct s5p_mfc_ctx *ctx,
                 unsigned int reason, unsigned int err)
{
    struct s5p_mfc_buf *src_buf;
    struct s5p_mfc_dev *dev;
    unsigned long flags;

    if (ctx == NULL)
        return;
    dev = ctx->dev;
    s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    ctx->int_type = reason;
    ctx->int_err = err;
    ctx->int_cond = 1;
    clear_work_bit(ctx);
    if (err == 0) {
        ctx->state = MFCINST_RUNNING;
        if (!ctx->dpb_flush_flag && ctx->head_processed) {
            spin_lock_irqsave(&dev->irqlock, flags);
            if (!list_empty(&ctx->src_queue)) {
                src_buf = list_entry(ctx->src_queue.next,
                         struct s5p_mfc_buf, list);
                list_del(&src_buf->list);
                ctx->src_queue_cnt--;
                vb2_buffer_done(src_buf->b,
                        VB2_BUF_STATE_DONE);
            }
            spin_unlock_irqrestore(&dev->irqlock, flags);
        } else {
            ctx->dpb_flush_flag = 0;
        }
        if (test_and_clear_bit(0, &dev->hw_lock) == 0)
            BUG();

        s5p_mfc_clock_off();

        wake_up(&ctx->queue);
        s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
    } else {
        if (test_and_clear_bit(0, &dev->hw_lock) == 0)
            BUG();

        s5p_mfc_clock_off();

        wake_up(&ctx->queue);
    }
}

static void s5p_mfc_handle_stream_complete(struct s5p_mfc_ctx *ctx,
                 unsigned int reason, unsigned int err)
{
    struct s5p_mfc_dev *dev = ctx->dev;
    struct s5p_mfc_buf *mb_entry;

    mfc_debug(2, "Stream completed");

    s5p_mfc_clear_int_flags(dev);
    ctx->int_type = reason;
    ctx->int_err = err;
    ctx->state = MFCINST_FINISHED;

    spin_lock(&dev->irqlock);
    if (!list_empty(&ctx->dst_queue)) {
        mb_entry = list_entry(ctx->dst_queue.next, struct s5p_mfc_buf,
                                    list);
        list_del(&mb_entry->list);
        ctx->dst_queue_cnt--;
        vb2_set_plane_payload(mb_entry->b, 0, 0);
        vb2_buffer_done(mb_entry->b, VB2_BUF_STATE_DONE);
    }
    spin_unlock(&dev->irqlock);

    clear_work_bit(ctx);

    if (test_and_clear_bit(0, &dev->hw_lock) == 0)
        WARN_ON(1);

    s5p_mfc_clock_off();
    wake_up(&ctx->queue);
    s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
}

/* Interrupt processing */
static irqreturn_t s5p_mfc_irq(int irq, void *priv)
{
    struct s5p_mfc_dev *dev = priv;
    struct s5p_mfc_ctx *ctx;
    unsigned int reason;
    unsigned int err;

    mfc_debug_enter();
    /* Reset the timeout watchdog */
    atomic_set(&dev->watchdog_cnt, 0);
    ctx = dev->ctx[dev->curr_ctx];
    /* Get the reason of interrupt and the error code */
    reason = s5p_mfc_hw_call(dev->mfc_ops, get_int_reason, dev);
    err = s5p_mfc_hw_call(dev->mfc_ops, get_int_err, dev);
    mfc_debug(1, "Int reason: %d (err: %08x)\n", reason, err);
    switch (reason) {
    case S5P_MFC_R2H_CMD_ERR_RET:
        /* An error has occured */
        if (ctx->state == MFCINST_RUNNING &&
            s5p_mfc_hw_call(dev->mfc_ops, err_dec, err) >=
                dev->warn_start)
            s5p_mfc_handle_frame(ctx, reason, err);
        else
            s5p_mfc_handle_error(ctx, reason, err);
        clear_bit(0, &dev->enter_suspend);
        break;

    case S5P_MFC_R2H_CMD_SLICE_DONE_RET:
    case S5P_MFC_R2H_CMD_FIELD_DONE_RET:
    case S5P_MFC_R2H_CMD_FRAME_DONE_RET:
        if (ctx->c_ops->post_frame_start) {
            if (ctx->c_ops->post_frame_start(ctx))
                mfc_err("post_frame_start() failed\n");
            s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
            wake_up_ctx(ctx, reason, err);
            if (test_and_clear_bit(0, &dev->hw_lock) == 0)
                BUG();
            s5p_mfc_clock_off();
            s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
        } else {
            s5p_mfc_handle_frame(ctx, reason, err);
        }
        break;

    case S5P_MFC_R2H_CMD_SEQ_DONE_RET:
        s5p_mfc_handle_seq_done(ctx, reason, err);
        break;

    case S5P_MFC_R2H_CMD_OPEN_INSTANCE_RET:
        ctx->inst_no = s5p_mfc_hw_call(dev->mfc_ops, get_inst_no, dev);
        ctx->state = MFCINST_GOT_INST;
        clear_work_bit(ctx);
        wake_up(&ctx->queue);
        goto irq_cleanup_hw;

    case S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET:
        clear_work_bit(ctx);
        ctx->state = MFCINST_FREE;
        wake_up(&ctx->queue);
        goto irq_cleanup_hw;

    case S5P_MFC_R2H_CMD_SYS_INIT_RET:
    case S5P_MFC_R2H_CMD_FW_STATUS_RET:
    case S5P_MFC_R2H_CMD_SLEEP_RET:
    case S5P_MFC_R2H_CMD_WAKEUP_RET:
        if (ctx)
            clear_work_bit(ctx);
        s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
        wake_up_dev(dev, reason, err);
        clear_bit(0, &dev->hw_lock);
        clear_bit(0, &dev->enter_suspend);
        break;

    case S5P_MFC_R2H_CMD_INIT_BUFFERS_RET:
        s5p_mfc_handle_init_buffers(ctx, reason, err);
        break;

    case S5P_MFC_R2H_CMD_COMPLETE_SEQ_RET:
        s5p_mfc_handle_stream_complete(ctx, reason, err);
        break;

    default:
        mfc_debug(2, "Unknown int reason\n");
        s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    }
    mfc_debug_leave();
    return IRQ_HANDLED;
irq_cleanup_hw:
    s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
    ctx->int_type = reason;
    ctx->int_err = err;
    ctx->int_cond = 1;
    if (test_and_clear_bit(0, &dev->hw_lock) == 0)
        mfc_err("Failed to unlock hw\n");

    s5p_mfc_clock_off();

    s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
    mfc_debug(2, "Exit via irq_cleanup_hw\n");
    return IRQ_HANDLED;
}

/* Open an MFC node */
static int s5p_mfc_open(struct file *file)
{
    struct s5p_mfc_dev *dev = video_drvdata(file);
    struct s5p_mfc_ctx *ctx = NULL;
    struct vb2_queue *q;
    int ret = 0;

    mfc_debug_enter();
    if (mutex_lock_interruptible(&dev->mfc_mutex))
        return -ERESTARTSYS;
    dev->num_inst++;    /* It is guarded by mfc_mutex in vfd */
    /* Allocate memory for context */
    ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
    if (!ctx) {
        mfc_err("Not enough memory\n");
        ret = -ENOMEM;
        goto err_alloc;
    }
    v4l2_fh_init(&ctx->fh, video_devdata(file));
    file->private_data = &ctx->fh;
    v4l2_fh_add(&ctx->fh);
    ctx->dev = dev;
    INIT_LIST_HEAD(&ctx->src_queue);
    INIT_LIST_HEAD(&ctx->dst_queue);
    ctx->src_queue_cnt = 0;
    ctx->dst_queue_cnt = 0;
    /* Get context number */
    ctx->num = 0;
    while (dev->ctx[ctx->num]) {
        ctx->num++;
        if (ctx->num >= MFC_NUM_CONTEXTS) {
            mfc_err("Too many open contexts\n");
            ret = -EBUSY;
            goto err_no_ctx;
        }
    }
    /* Mark context as idle */
    clear_work_bit_irqsave(ctx);
    dev->ctx[ctx->num] = ctx;
    if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
        ctx->type = MFCINST_DECODER;
        ctx->c_ops = get_dec_codec_ops();
        s5p_mfc_dec_init(ctx);
        /* Setup ctrl handler */
        ret = s5p_mfc_dec_ctrls_setup(ctx);
        if (ret) {
            mfc_err("Failed to setup mfc controls\n");
            goto err_ctrls_setup;
        }
    } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
        ctx->type = MFCINST_ENCODER;
        ctx->c_ops = get_enc_codec_ops();
        /* only for encoder */
        INIT_LIST_HEAD(&ctx->ref_queue);
        ctx->ref_queue_cnt = 0;
        s5p_mfc_enc_init(ctx);
        /* Setup ctrl handler */
        ret = s5p_mfc_enc_ctrls_setup(ctx);
        if (ret) {
            mfc_err("Failed to setup mfc controls\n");
            goto err_ctrls_setup;
        }
    } else {
        ret = -ENOENT;
        goto err_bad_node;
    }
    ctx->fh.ctrl_handler = &ctx->ctrl_handler;
    ctx->inst_no = -1;
    /* Load firmware if this is the first instance */
    if (dev->num_inst == 1) {
        dev->watchdog_timer.expires = jiffies +
                    msecs_to_jiffies(MFC_WATCHDOG_INTERVAL);
        add_timer(&dev->watchdog_timer);
        ret = s5p_mfc_power_on();
        if (ret < 0) {
            mfc_err("power on failed\n");
            goto err_pwr_enable;
        }
        s5p_mfc_clock_on();
        ret = s5p_mfc_alloc_and_load_firmware(dev);
        if (ret)
            goto err_alloc_fw;
        /* Init the FW */
        ret = s5p_mfc_init_hw(dev);
        if (ret)
            goto err_init_hw;
        s5p_mfc_clock_off();
    }
    /* Init videobuf2 queue for CAPTURE */
    q = &ctx->vq_dst;
    q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
    q->drv_priv = &ctx->fh;
    if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
        q->io_modes = VB2_MMAP;
        q->ops = get_dec_queue_ops();
    } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
        q->io_modes = VB2_MMAP | VB2_USERPTR;
        q->ops = get_enc_queue_ops();
    } else {
        ret = -ENOENT;
        goto err_queue_init;
    }
    q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops;
    ret = vb2_queue_init(q);
    if (ret) {
        mfc_err("Failed to initialize videobuf2 queue(capture)\n");
        goto err_queue_init;
    }
    /* Init videobuf2 queue for OUTPUT */
    q = &ctx->vq_src;
    q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
    q->io_modes = VB2_MMAP;
    q->drv_priv = &ctx->fh;
    if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
        q->io_modes = VB2_MMAP;
        q->ops = get_dec_queue_ops();
    } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
        q->io_modes = VB2_MMAP | VB2_USERPTR;
        q->ops = get_enc_queue_ops();
    } else {
        ret = -ENOENT;
        goto err_queue_init;
    }
    q->mem_ops = (struct vb2_mem_ops *)&vb2_dma_contig_memops;
    ret = vb2_queue_init(q);
    if (ret) {
        mfc_err("Failed to initialize videobuf2 queue(output)\n");
        goto err_queue_init;
    }
    init_waitqueue_head(&ctx->queue);
    mutex_unlock(&dev->mfc_mutex);
    mfc_debug_leave();
    return ret;
    /* Deinit when failure occured */
err_queue_init:
err_init_hw:
    s5p_mfc_release_firmware(dev);
err_alloc_fw:
    dev->ctx[ctx->num] = NULL;
    del_timer_sync(&dev->watchdog_timer);
    s5p_mfc_clock_off();
err_pwr_enable:
    if (dev->num_inst == 1) {
        if (s5p_mfc_power_off() < 0)
            mfc_err("power off failed\n");
        s5p_mfc_release_firmware(dev);
    }
err_ctrls_setup:
    s5p_mfc_dec_ctrls_delete(ctx);
err_bad_node:
err_no_ctx:
    v4l2_fh_del(&ctx->fh);
    v4l2_fh_exit(&ctx->fh);
    kfree(ctx);
err_alloc:
    dev->num_inst--;
    mutex_unlock(&dev->mfc_mutex);
    mfc_debug_leave();
    return ret;
}

/* Release MFC context */
static int s5p_mfc_release(struct file *file)
{
    struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
    struct s5p_mfc_dev *dev = ctx->dev;

    mfc_debug_enter();
    mutex_lock(&dev->mfc_mutex);
    s5p_mfc_clock_on();
    vb2_queue_release(&ctx->vq_src);
    vb2_queue_release(&ctx->vq_dst);
    /* Mark context as idle */
    clear_work_bit_irqsave(ctx);
    /* If instance was initialised then
     * return instance and free reosurces */
    if (ctx->inst_no != MFC_NO_INSTANCE_SET) {
        mfc_debug(2, "Has to free instance\n");
        ctx->state = MFCINST_RETURN_INST;
        set_work_bit_irqsave(ctx);
        s5p_mfc_clean_ctx_int_flags(ctx);
        s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
        /* Wait until instance is returned or timeout occured */
        if (s5p_mfc_wait_for_done_ctx
            (ctx, S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET, 0)) {
            s5p_mfc_clock_off();
            mfc_err("Err returning instance\n");
        }
        mfc_debug(2, "After free instance\n");
        /* Free resources */
        s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers, ctx);
        s5p_mfc_hw_call(dev->mfc_ops, release_instance_buffer, ctx);
        if (ctx->type == MFCINST_DECODER)
            s5p_mfc_hw_call(dev->mfc_ops, release_dec_desc_buffer,
                    ctx);

        ctx->inst_no = MFC_NO_INSTANCE_SET;
    }
    /* hardware locking scheme */
    if (dev->curr_ctx == ctx->num)
        clear_bit(0, &dev->hw_lock);
    dev->num_inst--;
    if (dev->num_inst == 0) {
        mfc_debug(2, "Last instance - release firmware\n");
        /* reset <-> F/W release */
        s5p_mfc_reset(dev);
        s5p_mfc_deinit_hw(dev);
        s5p_mfc_release_firmware(dev);
        del_timer_sync(&dev->watchdog_timer);
        if (s5p_mfc_power_off() < 0)
            mfc_err("Power off failed\n");
    }
    mfc_debug(2, "Shutting down clock\n");
    s5p_mfc_clock_off();
    dev->ctx[ctx->num] = NULL;
    s5p_mfc_dec_ctrls_delete(ctx);
    v4l2_fh_del(&ctx->fh);
    v4l2_fh_exit(&ctx->fh);
    kfree(ctx);
    mfc_debug_leave();
    mutex_unlock(&dev->mfc_mutex);
    return 0;
}

/* Poll */
static unsigned int s5p_mfc_poll(struct file *file,
                 struct poll_table_struct *wait)
{
    struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
    struct s5p_mfc_dev *dev = ctx->dev;
    struct vb2_queue *src_q, *dst_q;
    struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
    unsigned int rc = 0;
    unsigned long flags;

    mutex_lock(&dev->mfc_mutex);
    src_q = &ctx->vq_src;
    dst_q = &ctx->vq_dst;
    /*
     * There has to be at least one buffer queued on each queued_list, which
     * means either in driver already or waiting for driver to claim it
     * and start processing.
     */
    if ((!src_q->streaming || list_empty(&src_q->queued_list))
        && (!dst_q->streaming || list_empty(&dst_q->queued_list))) {
        rc = POLLERR;
        goto end;
    }
    mutex_unlock(&dev->mfc_mutex);
    poll_wait(file, &ctx->fh.wait, wait);
    poll_wait(file, &src_q->done_wq, wait);
    poll_wait(file, &dst_q->done_wq, wait);
    mutex_lock(&dev->mfc_mutex);
    if (v4l2_event_pending(&ctx->fh))
        rc |= POLLPRI;
    spin_lock_irqsave(&src_q->done_lock, flags);
    if (!list_empty(&src_q->done_list))
        src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer,
                                done_entry);
    if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE
                || src_vb->state == VB2_BUF_STATE_ERROR))
        rc |= POLLOUT | POLLWRNORM;
    spin_unlock_irqrestore(&src_q->done_lock, flags);
    spin_lock_irqsave(&dst_q->done_lock, flags);
    if (!list_empty(&dst_q->done_list))
        dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer,
                                done_entry);
    if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE
                || dst_vb->state == VB2_BUF_STATE_ERROR))
        rc |= POLLIN | POLLRDNORM;
    spin_unlock_irqrestore(&dst_q->done_lock, flags);
end:
    mutex_unlock(&dev->mfc_mutex);
    return rc;
}

/* Mmap */
static int s5p_mfc_mmap(struct file *file, struct vm_area_struct *vma)
{
    struct s5p_mfc_ctx *ctx = fh_to_ctx(file->private_data);
    struct s5p_mfc_dev *dev = ctx->dev;
    unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
    int ret;

    if (mutex_lock_interruptible(&dev->mfc_mutex))
        return -ERESTARTSYS;
    if (offset < DST_QUEUE_OFF_BASE) {
        mfc_debug(2, "mmaping source\n");
        ret = vb2_mmap(&ctx->vq_src, vma);
    } else {        /* capture */
        mfc_debug(2, "mmaping destination\n");
        vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
        ret = vb2_mmap(&ctx->vq_dst, vma);
    }
    mutex_unlock(&dev->mfc_mutex);
    return ret;
}

/* v4l2 ops */
static const struct v4l2_file_operations s5p_mfc_fops = {
    .owner = THIS_MODULE,
    .open = s5p_mfc_open,
    .release = s5p_mfc_release,
    .poll = s5p_mfc_poll,
    .unlocked_ioctl = video_ioctl2,
    .mmap = s5p_mfc_mmap,
};

static int match_child(struct device *dev, void *data)
{
    if (!dev_name(dev))
        return 0;
    return !strcmp(dev_name(dev), (char *)data);
}

/* MFC probe function */
static int s5p_mfc_probe(struct platform_device *pdev)
{
    struct s5p_mfc_dev *dev;
    struct video_device *vfd;
    struct resource *res;
    int ret;

    pr_debug("%s++\n", __func__);
    dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
    if (!dev) {
        dev_err(&pdev->dev, "Not enough memory for MFC device\n");
        return -ENOMEM;
    }

    spin_lock_init(&dev->irqlock);
    spin_lock_init(&dev->condlock);
    dev->plat_dev = pdev;
    if (!dev->plat_dev) {
        dev_err(&pdev->dev, "No platform data specified\n");
        return -ENODEV;
    }

    dev->variant = (struct s5p_mfc_variant *)
        platform_get_device_id(pdev)->driver_data;

    ret = s5p_mfc_init_pm(dev);
    if (ret < 0) {
        dev_err(&pdev->dev, "failed to get mfc clock source\n");
        return ret;
    }

    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

    dev->regs_base = devm_request_and_ioremap(&pdev->dev, res);
    if (dev->regs_base == NULL) {
        dev_err(&pdev->dev, "Failed to obtain io memory\n");
        return -ENOENT;
    }

    res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
    if (res == NULL) {
        dev_err(&pdev->dev, "failed to get irq resource\n");
        ret = -ENOENT;
        goto err_res;
    }
    dev->irq = res->start;
    ret = devm_request_irq(&pdev->dev, dev->irq, s5p_mfc_irq,
                    IRQF_DISABLED, pdev->name, dev);
    if (ret) {
        dev_err(&pdev->dev, "Failed to install irq (%d)\n", ret);
        goto err_res;
    }

    dev->mem_dev_l = device_find_child(&dev->plat_dev->dev, "s5p-mfc-l",
                       match_child);
    if (!dev->mem_dev_l) {
        mfc_err("Mem child (L) device get failed\n");
        ret = -ENODEV;
        goto err_res;
    }

    dev->mem_dev_r = device_find_child(&dev->plat_dev->dev, "s5p-mfc-r",
                       match_child);
    if (!dev->mem_dev_r) {
        mfc_err("Mem child (R) device get failed\n");
        ret = -ENODEV;
        goto err_res;
    }

    dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l);
    if (IS_ERR_OR_NULL(dev->alloc_ctx[0])) {
        ret = PTR_ERR(dev->alloc_ctx[0]);
        goto err_res;
    }
    dev->alloc_ctx[1] = vb2_dma_contig_init_ctx(dev->mem_dev_r);
    if (IS_ERR_OR_NULL(dev->alloc_ctx[1])) {
        ret = PTR_ERR(dev->alloc_ctx[1]);
        goto err_mem_init_ctx_1;
    }

    mutex_init(&dev->mfc_mutex);

    ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
    if (ret)
        goto err_v4l2_dev_reg;
    init_waitqueue_head(&dev->queue);

    /* decoder */
    vfd = video_device_alloc();
    if (!vfd) {
        v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
        ret = -ENOMEM;
        goto err_dec_alloc;
    }
    vfd->fops   = &s5p_mfc_fops,
    vfd->ioctl_ops  = get_dec_v4l2_ioctl_ops();
    vfd->release    = video_device_release,
    vfd->lock   = &dev->mfc_mutex;
    vfd->v4l2_dev   = &dev->v4l2_dev;
    vfd->vfl_dir    = VFL_DIR_M2M;
    snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_DEC_NAME);
    dev->vfd_dec    = vfd;
    ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
    if (ret) {
        v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
        video_device_release(vfd);
        goto err_dec_reg;
    }
    v4l2_info(&dev->v4l2_dev,
          "decoder registered as /dev/video%d\n", vfd->num);
    video_set_drvdata(vfd, dev);

    /* encoder */
    vfd = video_device_alloc();
    if (!vfd) {
        v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n");
        ret = -ENOMEM;
        goto err_enc_alloc;
    }
    vfd->fops   = &s5p_mfc_fops,
    vfd->ioctl_ops  = get_enc_v4l2_ioctl_ops();
    vfd->release    = video_device_release,
    vfd->lock   = &dev->mfc_mutex;
    vfd->v4l2_dev   = &dev->v4l2_dev;
    vfd->vfl_dir    = VFL_DIR_M2M;
    snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_ENC_NAME);
    dev->vfd_enc    = vfd;
    ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
    if (ret) {
        v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
        video_device_release(vfd);
        goto err_enc_reg;
    }
    v4l2_info(&dev->v4l2_dev,
          "encoder registered as /dev/video%d\n", vfd->num);
    video_set_drvdata(vfd, dev);
    platform_set_drvdata(pdev, dev);

    dev->hw_lock = 0;
    dev->watchdog_workqueue = create_singlethread_workqueue(S5P_MFC_NAME);
    INIT_WORK(&dev->watchdog_work, s5p_mfc_watchdog_worker);
    atomic_set(&dev->watchdog_cnt, 0);
    init_timer(&dev->watchdog_timer);
    dev->watchdog_timer.data = (unsigned long)dev;
    dev->watchdog_timer.function = s5p_mfc_watchdog;

    /* Initialize HW ops and commands based on MFC version */
    s5p_mfc_init_hw_ops(dev);
    s5p_mfc_init_hw_cmds(dev);

    pr_debug("%s--\n", __func__);
    return 0;

/* Deinit MFC if probe had failed */
err_enc_reg:
    video_device_release(dev->vfd_enc);
err_enc_alloc:
    video_unregister_device(dev->vfd_dec);
err_dec_reg:
    video_device_release(dev->vfd_dec);
err_dec_alloc:
    v4l2_device_unregister(&dev->v4l2_dev);
err_v4l2_dev_reg:
    vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]);
err_mem_init_ctx_1:
    vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
err_res:
    s5p_mfc_final_pm(dev);

    pr_debug("%s-- with error\n", __func__);
    return ret;

}

/* Remove the driver */
static int __devexit s5p_mfc_remove(struct platform_device *pdev)
{
    struct s5p_mfc_dev *dev = platform_get_drvdata(pdev);

    v4l2_info(&dev->v4l2_dev, "Removing %s\n", pdev->name);

    del_timer_sync(&dev->watchdog_timer);
    flush_workqueue(dev->watchdog_workqueue);
    destroy_workqueue(dev->watchdog_workqueue);

    video_unregister_device(dev->vfd_enc);
    video_unregister_device(dev->vfd_dec);
    v4l2_device_unregister(&dev->v4l2_dev);
    vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[0]);
    vb2_dma_contig_cleanup_ctx(dev->alloc_ctx[1]);

    s5p_mfc_final_pm(dev);
    return 0;
}

#ifdef CONFIG_PM_SLEEP

static int s5p_mfc_suspend(struct device *dev)
{
    struct platform_device *pdev = to_platform_device(dev);
    struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
    int ret;

    if (m_dev->num_inst == 0)
        return 0;

    if (test_and_set_bit(0, &m_dev->enter_suspend) != 0) {
        mfc_err("Error: going to suspend for a second time\n");
        return -EIO;
    }

    /* Check if we're processing then wait if it necessary. */
    while (test_and_set_bit(0, &m_dev->hw_lock) != 0) {
        /* Try and lock the HW */
        /* Wait on the interrupt waitqueue */
        ret = wait_event_interruptible_timeout(m_dev->queue,
            m_dev->int_cond || m_dev->ctx[m_dev->curr_ctx]->int_cond,
            msecs_to_jiffies(MFC_INT_TIMEOUT));

        if (ret == 0) {
            mfc_err("Waiting for hardware to finish timed out\n");
            return -EIO;
        }
    }

    return s5p_mfc_sleep(m_dev);
}

static int s5p_mfc_resume(struct device *dev)
{
    struct platform_device *pdev = to_platform_device(dev);
    struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);

    if (m_dev->num_inst == 0)
        return 0;
    return s5p_mfc_wakeup(m_dev);
}
#endif

#ifdef CONFIG_PM_RUNTIME
static int s5p_mfc_runtime_suspend(struct device *dev)
{
    struct platform_device *pdev = to_platform_device(dev);
    struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);

    atomic_set(&m_dev->pm.power, 0);
    return 0;
}

static int s5p_mfc_runtime_resume(struct device *dev)
{
    struct platform_device *pdev = to_platform_device(dev);
    struct s5p_mfc_dev *m_dev = platform_get_drvdata(pdev);
    int pre_power;

    if (!m_dev->alloc_ctx)
        return 0;
    pre_power = atomic_read(&m_dev->pm.power);
    atomic_set(&m_dev->pm.power, 1);
    return 0;
}
#endif

/* Power management */
static const struct dev_pm_ops s5p_mfc_pm_ops = {
    SET_SYSTEM_SLEEP_PM_OPS(s5p_mfc_suspend, s5p_mfc_resume)
    SET_RUNTIME_PM_OPS(s5p_mfc_runtime_suspend, s5p_mfc_runtime_resume,
               NULL)
};

struct s5p_mfc_buf_size_v5 mfc_buf_size_v5 = {
    .h264_ctx   = MFC_H264_CTX_BUF_SIZE,
    .non_h264_ctx   = MFC_CTX_BUF_SIZE,
    .dsc        = DESC_BUF_SIZE,
    .shm        = SHARED_BUF_SIZE,
};

struct s5p_mfc_buf_size buf_size_v5 = {
    .fw = MAX_FW_SIZE,
    .cpb    = MAX_CPB_SIZE,
    .priv   = &mfc_buf_size_v5,
};

struct s5p_mfc_buf_align mfc_buf_align_v5 = {
    .base = MFC_BASE_ALIGN_ORDER,
};

static struct s5p_mfc_variant mfc_drvdata_v5 = {
    .version    = MFC_VERSION,
    .port_num   = MFC_NUM_PORTS,
    .buf_size   = &buf_size_v5,
    .buf_align  = &mfc_buf_align_v5,
    .mclk_name  = "sclk_mfc",
    .fw_name    = "s5p-mfc.fw",
};

struct s5p_mfc_buf_size_v6 mfc_buf_size_v6 = {
    .dev_ctx    = MFC_CTX_BUF_SIZE_V6,
    .h264_dec_ctx   = MFC_H264_DEC_CTX_BUF_SIZE_V6,
    .other_dec_ctx  = MFC_OTHER_DEC_CTX_BUF_SIZE_V6,
    .h264_enc_ctx   = MFC_H264_ENC_CTX_BUF_SIZE_V6,
    .other_enc_ctx  = MFC_OTHER_ENC_CTX_BUF_SIZE_V6,
};

struct s5p_mfc_buf_size buf_size_v6 = {
    .fw = MAX_FW_SIZE_V6,
    .cpb    = MAX_CPB_SIZE_V6,
    .priv   = &mfc_buf_size_v6,
};

struct s5p_mfc_buf_align mfc_buf_align_v6 = {
    .base = 0,
};

static struct s5p_mfc_variant mfc_drvdata_v6 = {
    .version    = MFC_VERSION_V6,
    .port_num   = MFC_NUM_PORTS_V6,
    .buf_size   = &buf_size_v6,
    .buf_align  = &mfc_buf_align_v6,
    .mclk_name      = "aclk_333",
    .fw_name        = "s5p-mfc-v6.fw",
};

static struct platform_device_id mfc_driver_ids[] = {
    {
        .name = "s5p-mfc",
        .driver_data = (unsigned long)&mfc_drvdata_v5,
    }, {
        .name = "s5p-mfc-v5",
        .driver_data = (unsigned long)&mfc_drvdata_v5,
    }, {
        .name = "s5p-mfc-v6",
        .driver_data = (unsigned long)&mfc_drvdata_v6,
    },
    {},
};
MODULE_DEVICE_TABLE(platform, mfc_driver_ids);

static struct platform_driver s5p_mfc_driver = {
    .probe      = s5p_mfc_probe,
    .remove     = __devexit_p(s5p_mfc_remove),
    .id_table   = mfc_driver_ids,
    .driver = {
        .name   = S5P_MFC_NAME,
        .owner  = THIS_MODULE,
        .pm = &s5p_mfc_pm_ops
    },
};

module_platform_driver(s5p_mfc_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kamil Debski <[email protected]>");
MODULE_DESCRIPTION("Samsung S5P Multi Format Codec V4L2 driver");