Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1705 insertions, 0 deletions

diff --git a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc.c b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc.c
new file mode 100644
index 0000000000..e30e54935d
--- /dev/null
+++ b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc.c
@@ -0,0 +1,1705 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Samsung S5P Multi Format Codec v 5.1
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Kamil Debski, <k.debski@samsung.com>
+ */
+
+#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 <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <media/videobuf2-v4l2.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_iommu.h"
+#include "s5p_mfc_opr.h"
+#include "s5p_mfc_cmd.h"
+#include "s5p_mfc_pm.h"
+
+#define S5P_MFC_DEC_NAME	"s5p-mfc-dec"
+#define S5P_MFC_ENC_NAME	"s5p-mfc-enc"
+
+int mfc_debug_level;
+module_param_named(debug, mfc_debug_level, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level - higher value produces more verbose messages");
+
+static char *mfc_mem_size;
+module_param_named(mem, mfc_mem_size, charp, 0644);
+MODULE_PARM_DESC(mem, "Preallocated memory size for the firmware and context buffers");
+
+/* 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);
+}
+
+int s5p_mfc_get_new_ctx(struct s5p_mfc_dev *dev)
+{
+	unsigned long flags;
+	int ctx;
+
+	spin_lock_irqsave(&dev->condlock, flags);
+	ctx = dev->curr_ctx;
+	do {
+		ctx = (ctx + 1) % MFC_NUM_CONTEXTS;
+		if (ctx == dev->curr_ctx) {
+			if (!test_bit(ctx, &dev->ctx_work_bits))
+				ctx = -EAGAIN;
+			break;
+		}
+	} while (!test_bit(ctx, &dev->ctx_work_bits));
+	spin_unlock_irqrestore(&dev->condlock, flags);
+
+	return ctx;
+}
+
+/* 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);
+}
+
+void s5p_mfc_cleanup_queue(struct list_head *lh, struct vb2_queue *vq)
+{
+	struct s5p_mfc_buf *b;
+	int i;
+
+	while (!list_empty(lh)) {
+		b = list_entry(lh->next, struct s5p_mfc_buf, list);
+		for (i = 0; i < b->b->vb2_buf.num_planes; i++)
+			vb2_set_plane_payload(&b->b->vb2_buf, i, 0);
+		vb2_buffer_done(&b->b->vb2_buf, VB2_BUF_STATE_ERROR);
+		list_del(&b->list);
+	}
+}
+
+static void s5p_mfc_watchdog(struct timer_list *t)
+{
+	struct s5p_mfc_dev *dev = from_timer(dev, t, watchdog_timer);
+
+	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");
+		schedule_work(&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_cleanup_queue(&ctx->dst_queue, &ctx->vq_dst);
+		s5p_mfc_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);
+
+	/* De-init MFC */
+	s5p_mfc_deinit_hw(dev);
+
+	/*
+	 * 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_load_firmware(dev);
+		if (ret) {
+			mfc_err("Failed to reload FW\n");
+			goto unlock;
+		}
+		s5p_mfc_clock_on();
+		ret = s5p_mfc_init_hw(dev);
+		s5p_mfc_clock_off();
+		if (ret)
+			mfc_err("Failed to reinit FW\n");
+	}
+unlock:
+	if (mutex_locked)
+		mutex_unlock(&dev->mfc_mutex);
+}
+
+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->vb2_buf.index);
+		vb2_set_plane_payload(&dst_buf->b->vb2_buf, 0, 0);
+		vb2_set_plane_payload(&dst_buf->b->vb2_buf, 1, 0);
+		list_del(&dst_buf->list);
+		dst_buf->flags |= MFC_BUF_FLAG_EOS;
+		ctx->dst_queue_cnt--;
+		dst_buf->b->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->field = V4L2_FIELD_NONE;
+		else
+			dst_buf->b->field = V4L2_FIELD_INTERLACED;
+		dst_buf->b->flags |= V4L2_BUF_FLAG_LAST;
+
+		ctx->dec_dst_flag &= ~(1 << dst_buf->b->vb2_buf.index);
+		vb2_buffer_done(&dst_buf->b->vb2_buf, 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;
+	u32 dec_y_addr;
+	unsigned int frame_type;
+
+	/* Make sure we actually have a new frame before continuing. */
+	frame_type = s5p_mfc_hw_call(dev->mfc_ops, get_dec_frame_type, dev);
+	if (frame_type == S5P_FIMV_DECODE_FRAME_SKIPPED)
+		return;
+	dec_y_addr = (u32)s5p_mfc_hw_call(dev->mfc_ops, get_dec_y_adr, dev);
+
+	/*
+	 * Copy timestamp / timecode from decoded src to dst and set
+	 * appropriate flags.
+	 */
+	src_buf = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list);
+	list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
+		u32 addr = (u32)vb2_dma_contig_plane_dma_addr(&dst_buf->b->vb2_buf, 0);
+
+		if (addr == dec_y_addr) {
+			dst_buf->b->timecode = src_buf->b->timecode;
+			dst_buf->b->vb2_buf.timestamp =
+						src_buf->b->vb2_buf.timestamp;
+			dst_buf->b->flags &=
+				~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+			dst_buf->b->flags |=
+				src_buf->b->flags
+				& V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
+			switch (frame_type) {
+			case S5P_FIMV_DECODE_FRAME_I_FRAME:
+				dst_buf->b->flags |=
+						V4L2_BUF_FLAG_KEYFRAME;
+				break;
+			case S5P_FIMV_DECODE_FRAME_P_FRAME:
+				dst_buf->b->flags |=
+						V4L2_BUF_FLAG_PFRAME;
+				break;
+			case S5P_FIMV_DECODE_FRAME_B_FRAME:
+				dst_buf->b->flags |=
+						V4L2_BUF_FLAG_BFRAME;
+				break;
+			default:
+				/*
+				 * Don't know how to handle
+				 * S5P_FIMV_DECODE_FRAME_OTHER_FRAME.
+				 */
+				mfc_debug(2, "Unexpected frame type: %d\n",
+						frame_type);
+			}
+			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;
+	u32 dspl_y_addr;
+	unsigned int frame_type;
+
+	dspl_y_addr = (u32)s5p_mfc_hw_call(dev->mfc_ops, get_dspl_y_adr, dev);
+	if (IS_MFCV6_PLUS(dev))
+		frame_type = s5p_mfc_hw_call(dev->mfc_ops,
+			get_disp_frame_type, ctx);
+	else
+		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 vb2_buffer does it correspond to
+	 */
+	list_for_each_entry(dst_buf, &ctx->dst_queue, list) {
+		u32 addr = (u32)vb2_dma_contig_plane_dma_addr(&dst_buf->b->vb2_buf, 0);
+
+		/* Check if this is the buffer we're looking for */
+		if (addr == dspl_y_addr) {
+			list_del(&dst_buf->list);
+			ctx->dst_queue_cnt--;
+			dst_buf->b->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->field = V4L2_FIELD_NONE;
+			else
+				dst_buf->b->field =
+							V4L2_FIELD_INTERLACED;
+			vb2_set_plane_payload(&dst_buf->b->vb2_buf, 0,
+						ctx->luma_size);
+			vb2_set_plane_payload(&dst_buf->b->vb2_buf, 1,
+						ctx->chroma_size);
+			clear_bit(dst_buf->b->vb2_buf.index,
+							&ctx->dec_dst_flag);
+
+			vb2_buffer_done(&dst_buf->b->vb2_buf, err ?
+				VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
+
+			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;
+	unsigned int dec_frame_status;
+	struct s5p_mfc_buf *src_buf;
+	unsigned int res_change;
+
+	dst_frame_status = s5p_mfc_hw_call(dev->mfc_ops, get_dspl_status, dev)
+				& S5P_FIMV_DEC_STATUS_DECODING_STATUS_MASK;
+	dec_frame_status = s5p_mfc_hw_call(dev->mfc_ops, get_dec_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);
+		WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+		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;
+
+	/* 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) {
+			static const struct v4l2_event ev_src_ch = {
+				.type = V4L2_EVENT_SOURCE_CHANGE,
+				.u.src_change.changes =
+					V4L2_EVENT_SRC_CH_RESOLUTION,
+			};
+
+			s5p_mfc_handle_frame_all_extracted(ctx);
+			ctx->state = MFCINST_RES_CHANGE_END;
+			v4l2_event_queue_fh(&ctx->fh, &ev_src_ch);
+
+			goto leave_handle_frame;
+		} else {
+			s5p_mfc_handle_frame_all_extracted(ctx);
+		}
+	}
+
+	if (dec_frame_status == S5P_FIMV_DEC_STATUS_DECODING_DISPLAY)
+		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->codec_mode != S5P_MFC_CODEC_VP8_DEC &&
+			ctx->consumed_stream + STUFF_BYTE <
+			src_buf->b->vb2_buf.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 {
+			mfc_debug(2, "MFC needs next buffer\n");
+			ctx->consumed_stream = 0;
+			if (src_buf->flags & MFC_BUF_FLAG_EOS)
+				ctx->state = MFCINST_FINISHING;
+			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,
+						VB2_BUF_STATE_ERROR);
+			else
+				vb2_buffer_done(&src_buf->b->vb2_buf,
+						VB2_BUF_STATE_DONE);
+		}
+	}
+leave_handle_frame:
+	if ((ctx->src_queue_cnt == 0 && ctx->state != MFCINST_FINISHING)
+				    || ctx->dst_queue_cnt < ctx->pb_count)
+		clear_work_bit(ctx);
+	s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
+	wake_up_ctx(ctx, reason, err);
+	WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+	s5p_mfc_clock_off();
+	/* if suspending, wake up device and do not try_run again*/
+	if (test_bit(0, &dev->enter_suspend))
+		wake_up_dev(dev, reason, err);
+	else
+		s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
+}
+
+/* Error handling for interrupt */
+static void s5p_mfc_handle_error(struct s5p_mfc_dev *dev,
+		struct s5p_mfc_ctx *ctx, unsigned int reason, unsigned int err)
+{
+	mfc_err("Interrupt Error: %08x\n", err);
+
+	if (ctx) {
+		/* Error recovery is dependent on the state of context */
+		switch (ctx->state) {
+		case MFCINST_RES_CHANGE_INIT:
+		case MFCINST_RES_CHANGE_FLUSH:
+		case MFCINST_RES_CHANGE_END:
+		case MFCINST_FINISHING:
+		case MFCINST_FINISHED:
+		case MFCINST_RUNNING:
+			/*
+			 * It is highly probable that an error occurred
+			 * while decoding a frame
+			 */
+			clear_work_bit(ctx);
+			ctx->state = MFCINST_ERROR;
+			/* Mark all dst buffers as having an error */
+			s5p_mfc_cleanup_queue(&ctx->dst_queue, &ctx->vq_dst);
+			/* Mark all src buffers as having an error */
+			s5p_mfc_cleanup_queue(&ctx->src_queue, &ctx->vq_src);
+			wake_up_ctx(ctx, reason, err);
+			break;
+		default:
+			clear_work_bit(ctx);
+			ctx->state = MFCINST_ERROR;
+			wake_up_ctx(ctx, reason, err);
+			break;
+		}
+	}
+	WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+	s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
+	s5p_mfc_clock_off();
+	wake_up_dev(dev, reason, err);
+}
+
+/* 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)
+		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->pb_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 (FW_HAS_E_MIN_SCRATCH_BUF(dev))
+			ctx->scratch_buf_size = s5p_mfc_hw_call(dev->mfc_ops,
+						get_min_scratch_buf_size, 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->vb2_buf.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);
+	WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+	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;
+
+	if (!ctx)
+		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) {
+			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,
+						VB2_BUF_STATE_DONE);
+			}
+		} else {
+			ctx->dpb_flush_flag = 0;
+		}
+		WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+
+		s5p_mfc_clock_off();
+
+		wake_up(&ctx->queue);
+		s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
+	} else {
+		WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+
+		s5p_mfc_clock_off();
+
+		wake_up(&ctx->queue);
+	}
+}
+
+static void s5p_mfc_handle_stream_complete(struct s5p_mfc_ctx *ctx)
+{
+	struct s5p_mfc_dev *dev = ctx->dev;
+	struct s5p_mfc_buf *mb_entry;
+
+	mfc_debug(2, "Stream completed\n");
+
+	ctx->state = MFCINST_FINISHED;
+
+	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->vb2_buf, 0, 0);
+		vb2_buffer_done(&mb_entry->b->vb2_buf, VB2_BUF_STATE_DONE);
+	}
+
+	clear_work_bit(ctx);
+
+	WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+
+	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);
+	spin_lock(&dev->irqlock);
+	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 occurred */
+		if (ctx->state == MFCINST_RUNNING &&
+			(s5p_mfc_hw_call(dev->mfc_ops, err_dec, err) >=
+				dev->warn_start ||
+				err == S5P_FIMV_ERR_NO_VALID_SEQ_HDR ||
+				err == S5P_FIMV_ERR_INCOMPLETE_FRAME ||
+				err == S5P_FIMV_ERR_TIMEOUT))
+			s5p_mfc_handle_frame(ctx, reason, err);
+		else
+			s5p_mfc_handle_error(dev, 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");
+
+			if (ctx->state == MFCINST_FINISHING &&
+						list_empty(&ctx->ref_queue)) {
+				s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
+				s5p_mfc_handle_stream_complete(ctx);
+				break;
+			}
+			s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
+			WARN_ON(test_and_clear_bit(0, &dev->hw_lock) == 0);
+			s5p_mfc_clock_off();
+			wake_up_ctx(ctx, reason, err);
+			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;
+		goto irq_cleanup_hw;
+
+	case S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET:
+		ctx->inst_no = MFC_NO_INSTANCE_SET;
+		ctx->state = MFCINST_FREE;
+		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);
+		clear_bit(0, &dev->hw_lock);
+		clear_bit(0, &dev->enter_suspend);
+		wake_up_dev(dev, reason, err);
+		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_hw_call(dev->mfc_ops, clear_int_flags, dev);
+		ctx->int_type = reason;
+		ctx->int_err = err;
+		s5p_mfc_handle_stream_complete(ctx);
+		break;
+
+	case S5P_MFC_R2H_CMD_DPB_FLUSH_RET:
+		ctx->state = MFCINST_RUNNING;
+		goto irq_cleanup_hw;
+
+	default:
+		mfc_debug(2, "Unknown int reason\n");
+		s5p_mfc_hw_call(dev->mfc_ops, clear_int_flags, dev);
+	}
+	spin_unlock(&dev->irqlock);
+	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();
+	clear_work_bit(ctx);
+	wake_up(&ctx->queue);
+
+	s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
+	spin_unlock(&dev->irqlock);
+	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 video_device *vdev = video_devdata(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) {
+		ret = -ENOMEM;
+		goto err_alloc;
+	}
+	init_waitqueue_head(&ctx->queue);
+	v4l2_fh_init(&ctx->fh, vdev);
+	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_debug(2, "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 (vdev == dev->vfd_dec) {
+		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 (vdev == dev->vfd_enc) {
+		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 = MFC_NO_INSTANCE_SET;
+	/* 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_load_firmware(dev);
+		if (ret) {
+			s5p_mfc_clock_off();
+			goto err_load_fw;
+		}
+		/* Init the FW */
+		ret = s5p_mfc_init_hw(dev);
+		s5p_mfc_clock_off();
+		if (ret)
+			goto err_init_hw;
+	}
+	/* Init videobuf2 queue for CAPTURE */
+	q = &ctx->vq_dst;
+	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	q->drv_priv = &ctx->fh;
+	q->lock = &dev->mfc_mutex;
+	if (vdev == dev->vfd_dec) {
+		q->io_modes = VB2_MMAP;
+		q->ops = get_dec_queue_ops();
+	} else if (vdev == dev->vfd_enc) {
+		q->io_modes = VB2_MMAP | VB2_USERPTR;
+		q->ops = get_enc_queue_ops();
+	} else {
+		ret = -ENOENT;
+		goto err_queue_init;
+	}
+	/*
+	 * We'll do mostly sequential access, so sacrifice TLB efficiency for
+	 * faster allocation.
+	 */
+	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES;
+	q->mem_ops = &vb2_dma_contig_memops;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	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->drv_priv = &ctx->fh;
+	q->lock = &dev->mfc_mutex;
+	if (vdev == dev->vfd_dec) {
+		q->io_modes = VB2_MMAP;
+		q->ops = get_dec_queue_ops();
+	} else if (vdev == dev->vfd_enc) {
+		q->io_modes = VB2_MMAP | VB2_USERPTR;
+		q->ops = get_enc_queue_ops();
+	} else {
+		ret = -ENOENT;
+		goto err_queue_init;
+	}
+	/* One way to indicate end-of-stream for MFC is to set the
+	 * bytesused == 0. However by default videobuf2 handles bytesused
+	 * equal to 0 as a special case and changes its value to the size
+	 * of the buffer. Set the allow_zero_bytesused flag so that videobuf2
+	 * will keep the value of bytesused intact.
+	 */
+	q->allow_zero_bytesused = 1;
+
+	/*
+	 * We'll do mostly sequential access, so sacrifice TLB efficiency for
+	 * faster allocation.
+	 */
+	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES;
+	q->mem_ops = &vb2_dma_contig_memops;
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+	ret = vb2_queue_init(q);
+	if (ret) {
+		mfc_err("Failed to initialize videobuf2 queue(output)\n");
+		goto err_queue_init;
+	}
+	mutex_unlock(&dev->mfc_mutex);
+	mfc_debug_leave();
+	return ret;
+	/* Deinit when failure occurred */
+err_queue_init:
+	if (dev->num_inst == 1)
+		s5p_mfc_deinit_hw(dev);
+err_init_hw:
+err_load_fw:
+err_pwr_enable:
+	if (dev->num_inst == 1) {
+		if (s5p_mfc_power_off() < 0)
+			mfc_err("power off failed\n");
+		del_timer_sync(&dev->watchdog_timer);
+	}
+err_ctrls_setup:
+	s5p_mfc_dec_ctrls_delete(ctx);
+err_bad_node:
+	dev->ctx[ctx->num] = NULL;
+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;
+
+	/* if dev is null, do cleanup that doesn't need dev */
+	mfc_debug_enter();
+	if (dev)
+		mutex_lock(&dev->mfc_mutex);
+	vb2_queue_release(&ctx->vq_src);
+	vb2_queue_release(&ctx->vq_dst);
+	if (dev) {
+		s5p_mfc_clock_on();
+
+		/* Mark context as idle */
+		clear_work_bit_irqsave(ctx);
+		/*
+		 * If instance was initialised and not yet freed,
+		 * return instance and free resources
+		 */
+		if (ctx->state != MFCINST_FREE && ctx->state != MFCINST_INIT) {
+			mfc_debug(2, "Has to free instance\n");
+			s5p_mfc_close_mfc_inst(dev, ctx);
+		}
+		/* 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\n");
+			s5p_mfc_deinit_hw(dev);
+			del_timer_sync(&dev->watchdog_timer);
+			s5p_mfc_clock_off();
+			if (s5p_mfc_power_off() < 0)
+				mfc_err("Power off failed\n");
+		} else {
+			mfc_debug(2, "Shutting down clock\n");
+			s5p_mfc_clock_off();
+		}
+	}
+	if (dev)
+		dev->ctx[ctx->num] = NULL;
+	s5p_mfc_dec_ctrls_delete(ctx);
+	v4l2_fh_del(&ctx->fh);
+	/* vdev is gone if dev is null */
+	if (dev)
+		v4l2_fh_exit(&ctx->fh);
+	kfree(ctx);
+	mfc_debug_leave();
+	if (dev)
+		mutex_unlock(&dev->mfc_mutex);
+
+	return 0;
+}
+
+/* Poll */
+static __poll_t 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;
+	__poll_t 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 ((!vb2_is_streaming(src_q) || list_empty(&src_q->queued_list)) &&
+	    (!vb2_is_streaming(dst_q) || list_empty(&dst_q->queued_list))) {
+		rc = EPOLLERR;
+		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 |= EPOLLPRI;
+	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 |= EPOLLOUT | EPOLLWRNORM;
+	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 |= EPOLLIN | EPOLLRDNORM;
+	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);
+	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+	int ret;
+
+	if (offset < DST_QUEUE_OFF_BASE) {
+		mfc_debug(2, "mmapping source\n");
+		ret = vb2_mmap(&ctx->vq_src, vma);
+	} else {		/* capture */
+		mfc_debug(2, "mmapping destination\n");
+		vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
+		ret = vb2_mmap(&ctx->vq_dst, vma);
+	}
+	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,
+};
+
+/* DMA memory related helper functions */
+static void s5p_mfc_memdev_release(struct device *dev)
+{
+	of_reserved_mem_device_release(dev);
+}
+
+static struct device *s5p_mfc_alloc_memdev(struct device *dev,
+					   const char *name, unsigned int idx)
+{
+	struct device *child;
+	int ret;
+
+	child = devm_kzalloc(dev, sizeof(*child), GFP_KERNEL);
+	if (!child)
+		return NULL;
+
+	device_initialize(child);
+	dev_set_name(child, "%s:%s", dev_name(dev), name);
+	child->parent = dev;
+	child->coherent_dma_mask = dev->coherent_dma_mask;
+	child->dma_mask = dev->dma_mask;
+	child->release = s5p_mfc_memdev_release;
+	child->dma_parms = devm_kzalloc(dev, sizeof(*child->dma_parms),
+					GFP_KERNEL);
+	if (!child->dma_parms)
+		goto err;
+
+	/*
+	 * The memdevs are not proper OF platform devices, so in order for them
+	 * to be treated as valid DMA masters we need a bit of a hack to force
+	 * them to inherit the MFC node's DMA configuration.
+	 */
+	of_dma_configure(child, dev->of_node, true);
+
+	if (device_add(child) == 0) {
+		ret = of_reserved_mem_device_init_by_idx(child, dev->of_node,
+							 idx);
+		if (ret == 0)
+			return child;
+		device_del(child);
+	}
+err:
+	put_device(child);
+	return NULL;
+}
+
+static int s5p_mfc_configure_2port_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	struct device *dev = &mfc_dev->plat_dev->dev;
+	void *bank2_virt;
+	dma_addr_t bank2_dma_addr;
+	unsigned long align_size = 1 << MFC_BASE_ALIGN_ORDER;
+	int ret;
+
+	/*
+	 * Create and initialize virtual devices for accessing
+	 * reserved memory regions.
+	 */
+	mfc_dev->mem_dev[BANK_L_CTX] = s5p_mfc_alloc_memdev(dev, "left",
+							   BANK_L_CTX);
+	if (!mfc_dev->mem_dev[BANK_L_CTX])
+		return -ENODEV;
+	mfc_dev->mem_dev[BANK_R_CTX] = s5p_mfc_alloc_memdev(dev, "right",
+							   BANK_R_CTX);
+	if (!mfc_dev->mem_dev[BANK_R_CTX]) {
+		device_unregister(mfc_dev->mem_dev[BANK_L_CTX]);
+		return -ENODEV;
+	}
+
+	/* Allocate memory for firmware and initialize both banks addresses */
+	ret = s5p_mfc_alloc_firmware(mfc_dev);
+	if (ret) {
+		device_unregister(mfc_dev->mem_dev[BANK_R_CTX]);
+		device_unregister(mfc_dev->mem_dev[BANK_L_CTX]);
+		return ret;
+	}
+
+	mfc_dev->dma_base[BANK_L_CTX] = mfc_dev->fw_buf.dma;
+
+	bank2_virt = dma_alloc_coherent(mfc_dev->mem_dev[BANK_R_CTX],
+				       align_size, &bank2_dma_addr, GFP_KERNEL);
+	if (!bank2_virt) {
+		s5p_mfc_release_firmware(mfc_dev);
+		device_unregister(mfc_dev->mem_dev[BANK_R_CTX]);
+		device_unregister(mfc_dev->mem_dev[BANK_L_CTX]);
+		return -ENOMEM;
+	}
+
+	/* Valid buffers passed to MFC encoder with LAST_FRAME command
+	 * should not have address of bank2 - MFC will treat it as a null frame.
+	 * To avoid such situation we set bank2 address below the pool address.
+	 */
+	mfc_dev->dma_base[BANK_R_CTX] = bank2_dma_addr - align_size;
+
+	dma_free_coherent(mfc_dev->mem_dev[BANK_R_CTX], align_size, bank2_virt,
+			  bank2_dma_addr);
+
+	vb2_dma_contig_set_max_seg_size(mfc_dev->mem_dev[BANK_L_CTX],
+					DMA_BIT_MASK(32));
+	vb2_dma_contig_set_max_seg_size(mfc_dev->mem_dev[BANK_R_CTX],
+					DMA_BIT_MASK(32));
+
+	return 0;
+}
+
+static void s5p_mfc_unconfigure_2port_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	device_unregister(mfc_dev->mem_dev[BANK_L_CTX]);
+	device_unregister(mfc_dev->mem_dev[BANK_R_CTX]);
+	vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK_L_CTX]);
+	vb2_dma_contig_clear_max_seg_size(mfc_dev->mem_dev[BANK_R_CTX]);
+}
+
+static int s5p_mfc_configure_common_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	struct device *dev = &mfc_dev->plat_dev->dev;
+	unsigned long mem_size = SZ_4M;
+
+	if (IS_ENABLED(CONFIG_DMA_CMA) || exynos_is_iommu_available(dev))
+		mem_size = SZ_8M;
+
+	if (mfc_mem_size)
+		mem_size = memparse(mfc_mem_size, NULL);
+
+	mfc_dev->mem_bitmap = bitmap_zalloc(mem_size >> PAGE_SHIFT, GFP_KERNEL);
+	if (!mfc_dev->mem_bitmap)
+		return -ENOMEM;
+
+	mfc_dev->mem_virt = dma_alloc_coherent(dev, mem_size,
+					       &mfc_dev->mem_base, GFP_KERNEL);
+	if (!mfc_dev->mem_virt) {
+		bitmap_free(mfc_dev->mem_bitmap);
+		dev_err(dev, "failed to preallocate %ld MiB for the firmware and context buffers\n",
+			(mem_size / SZ_1M));
+		return -ENOMEM;
+	}
+	mfc_dev->mem_size = mem_size;
+	mfc_dev->dma_base[BANK_L_CTX] = mfc_dev->mem_base;
+	mfc_dev->dma_base[BANK_R_CTX] = mfc_dev->mem_base;
+
+	/*
+	 * MFC hardware cannot handle 0 as a base address, so mark first 128K
+	 * as used (to keep required base alignment) and adjust base address
+	 */
+	if (mfc_dev->mem_base == (dma_addr_t)0) {
+		unsigned int offset = 1 << MFC_BASE_ALIGN_ORDER;
+
+		bitmap_set(mfc_dev->mem_bitmap, 0, offset >> PAGE_SHIFT);
+		mfc_dev->dma_base[BANK_L_CTX] += offset;
+		mfc_dev->dma_base[BANK_R_CTX] += offset;
+	}
+
+	/* Firmware allocation cannot fail in this case */
+	s5p_mfc_alloc_firmware(mfc_dev);
+
+	mfc_dev->mem_dev[BANK_L_CTX] = mfc_dev->mem_dev[BANK_R_CTX] = dev;
+	vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
+
+	dev_info(dev, "preallocated %ld MiB buffer for the firmware and context buffers\n",
+		 (mem_size / SZ_1M));
+
+	return 0;
+}
+
+static void s5p_mfc_unconfigure_common_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	struct device *dev = &mfc_dev->plat_dev->dev;
+
+	dma_free_coherent(dev, mfc_dev->mem_size, mfc_dev->mem_virt,
+			  mfc_dev->mem_base);
+	bitmap_free(mfc_dev->mem_bitmap);
+	vb2_dma_contig_clear_max_seg_size(dev);
+}
+
+static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	struct device *dev = &mfc_dev->plat_dev->dev;
+
+	if (exynos_is_iommu_available(dev) || !IS_TWOPORT(mfc_dev))
+		return s5p_mfc_configure_common_memory(mfc_dev);
+	else
+		return s5p_mfc_configure_2port_memory(mfc_dev);
+}
+
+static void s5p_mfc_unconfigure_dma_memory(struct s5p_mfc_dev *mfc_dev)
+{
+	struct device *dev = &mfc_dev->plat_dev->dev;
+
+	s5p_mfc_release_firmware(mfc_dev);
+	if (exynos_is_iommu_available(dev) || !IS_TWOPORT(mfc_dev))
+		s5p_mfc_unconfigure_common_memory(mfc_dev);
+	else
+		s5p_mfc_unconfigure_2port_memory(mfc_dev);
+}
+
+/* MFC probe function */
+static int s5p_mfc_probe(struct platform_device *pdev)
+{
+	struct s5p_mfc_dev *dev;
+	struct video_device *vfd;
+	int ret;
+
+	pr_debug("%s++\n", __func__);
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	spin_lock_init(&dev->irqlock);
+	spin_lock_init(&dev->condlock);
+	dev->plat_dev = pdev;
+	if (!dev->plat_dev) {
+		mfc_err("No platform data specified\n");
+		return -ENODEV;
+	}
+
+	dev->variant = of_device_get_match_data(&pdev->dev);
+	if (!dev->variant) {
+		dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n");
+		return -ENOENT;
+	}
+
+	dev->regs_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(dev->regs_base))
+		return PTR_ERR(dev->regs_base);
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+	dev->irq = ret;
+	ret = devm_request_irq(&pdev->dev, dev->irq, s5p_mfc_irq,
+					0, pdev->name, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to install irq (%d)\n", ret);
+		return ret;
+	}
+
+	ret = s5p_mfc_configure_dma_memory(dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to configure DMA memory\n");
+		return ret;
+	}
+
+	ret = s5p_mfc_init_pm(dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to get mfc clock source\n");
+		goto err_dma;
+	}
+
+	/*
+	 * Load fails if fs isn't mounted. Try loading anyway.
+	 * _open() will load it, it fails now. Ignore failure.
+	 */
+	s5p_mfc_load_firmware(dev);
+
+	mutex_init(&dev->mfc_mutex);
+	init_waitqueue_head(&dev->queue);
+	dev->hw_lock = 0;
+	INIT_WORK(&dev->watchdog_work, s5p_mfc_watchdog_worker);
+	atomic_set(&dev->watchdog_cnt, 0);
+	timer_setup(&dev->watchdog_timer, s5p_mfc_watchdog, 0);
+
+	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
+	if (ret)
+		goto err_v4l2_dev_reg;
+
+	/* 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;
+	vfd->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+	set_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags);
+	snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_DEC_NAME);
+	dev->vfd_dec	= vfd;
+	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;
+	vfd->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+	snprintf(vfd->name, sizeof(vfd->name), "%s", S5P_MFC_ENC_NAME);
+	dev->vfd_enc	= vfd;
+	video_set_drvdata(vfd, dev);
+	platform_set_drvdata(pdev, dev);
+
+	/* Initialize HW ops and commands based on MFC version */
+	s5p_mfc_init_hw_ops(dev);
+	s5p_mfc_init_hw_cmds(dev);
+	s5p_mfc_init_regs(dev);
+
+	/* Register decoder and encoder */
+	ret = video_register_device(dev->vfd_dec, VFL_TYPE_VIDEO, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+		goto err_dec_reg;
+	}
+	v4l2_info(&dev->v4l2_dev,
+		  "decoder registered as /dev/video%d\n", dev->vfd_dec->num);
+
+	ret = video_register_device(dev->vfd_enc, VFL_TYPE_VIDEO, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
+		goto err_enc_reg;
+	}
+	v4l2_info(&dev->v4l2_dev,
+		  "encoder registered as /dev/video%d\n", dev->vfd_enc->num);
+
+	pr_debug("%s--\n", __func__);
+	return 0;
+
+/* Deinit MFC if probe had failed */
+err_enc_reg:
+	video_unregister_device(dev->vfd_dec);
+	dev->vfd_dec = NULL;
+err_dec_reg:
+	video_device_release(dev->vfd_enc);
+err_enc_alloc:
+	video_device_release(dev->vfd_dec);
+err_dec_alloc:
+	v4l2_device_unregister(&dev->v4l2_dev);
+err_v4l2_dev_reg:
+	s5p_mfc_final_pm(dev);
+err_dma:
+	s5p_mfc_unconfigure_dma_memory(dev);
+
+	pr_debug("%s-- with error\n", __func__);
+	return ret;
+
+}
+
+/* Remove the driver */
+static void s5p_mfc_remove(struct platform_device *pdev)
+{
+	struct s5p_mfc_dev *dev = platform_get_drvdata(pdev);
+	struct s5p_mfc_ctx *ctx;
+	int i;
+
+	v4l2_info(&dev->v4l2_dev, "Removing %s\n", pdev->name);
+
+	/*
+	 * Clear ctx dev pointer to avoid races between s5p_mfc_remove()
+	 * and s5p_mfc_release() and s5p_mfc_release() accessing ctx->dev
+	 * after s5p_mfc_remove() is run during unbind.
+	 */
+	mutex_lock(&dev->mfc_mutex);
+	for (i = 0; i < MFC_NUM_CONTEXTS; i++) {
+		ctx = dev->ctx[i];
+		if (!ctx)
+			continue;
+		/* clear ctx->dev */
+		ctx->dev = NULL;
+	}
+	mutex_unlock(&dev->mfc_mutex);
+
+	del_timer_sync(&dev->watchdog_timer);
+	flush_work(&dev->watchdog_work);
+
+	video_unregister_device(dev->vfd_enc);
+	video_unregister_device(dev->vfd_dec);
+	v4l2_device_unregister(&dev->v4l2_dev);
+	s5p_mfc_unconfigure_dma_memory(dev);
+
+	s5p_mfc_final_pm(dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int s5p_mfc_suspend(struct device *dev)
+{
+	struct s5p_mfc_dev *m_dev = dev_get_drvdata(dev);
+	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, msecs_to_jiffies(MFC_INT_TIMEOUT));
+		if (ret == 0) {
+			mfc_err("Waiting for hardware to finish timed out\n");
+			clear_bit(0, &m_dev->enter_suspend);
+			return -EIO;
+		}
+	}
+
+	ret = s5p_mfc_sleep(m_dev);
+	if (ret) {
+		clear_bit(0, &m_dev->enter_suspend);
+		clear_bit(0, &m_dev->hw_lock);
+	}
+	return ret;
+}
+
+static int s5p_mfc_resume(struct device *dev)
+{
+	struct s5p_mfc_dev *m_dev = dev_get_drvdata(dev);
+
+	if (m_dev->num_inst == 0)
+		return 0;
+	return s5p_mfc_wakeup(m_dev);
+}
+#endif
+
+/* Power management */
+static const struct dev_pm_ops s5p_mfc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(s5p_mfc_suspend, s5p_mfc_resume)
+};
+
+static 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,
+};
+
+static struct s5p_mfc_buf_size buf_size_v5 = {
+	.fw	= MAX_FW_SIZE,
+	.cpb	= MAX_CPB_SIZE,
+	.priv	= &mfc_buf_size_v5,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v5 = {
+	.version	= MFC_VERSION,
+	.version_bit	= MFC_V5_BIT,
+	.port_num	= MFC_NUM_PORTS,
+	.buf_size	= &buf_size_v5,
+	.fw_name[0]	= "s5p-mfc.fw",
+	.clk_names	= {"mfc", "sclk_mfc"},
+	.num_clocks	= 2,
+	.use_clock_gating = true,
+};
+
+static 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,
+};
+
+static struct s5p_mfc_buf_size buf_size_v6 = {
+	.fw	= MAX_FW_SIZE_V6,
+	.cpb	= MAX_CPB_SIZE_V6,
+	.priv	= &mfc_buf_size_v6,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v6 = {
+	.version	= MFC_VERSION_V6,
+	.version_bit	= MFC_V6_BIT,
+	.port_num	= MFC_NUM_PORTS_V6,
+	.buf_size	= &buf_size_v6,
+	.fw_name[0]     = "s5p-mfc-v6.fw",
+	/*
+	 * v6-v2 firmware contains bug fixes and interface change
+	 * for init buffer command
+	 */
+	.fw_name[1]     = "s5p-mfc-v6-v2.fw",
+	.clk_names	= {"mfc"},
+	.num_clocks	= 1,
+};
+
+static struct s5p_mfc_buf_size_v6 mfc_buf_size_v7 = {
+	.dev_ctx	= MFC_CTX_BUF_SIZE_V7,
+	.h264_dec_ctx	= MFC_H264_DEC_CTX_BUF_SIZE_V7,
+	.other_dec_ctx	= MFC_OTHER_DEC_CTX_BUF_SIZE_V7,
+	.h264_enc_ctx	= MFC_H264_ENC_CTX_BUF_SIZE_V7,
+	.other_enc_ctx	= MFC_OTHER_ENC_CTX_BUF_SIZE_V7,
+};
+
+static struct s5p_mfc_buf_size buf_size_v7 = {
+	.fw	= MAX_FW_SIZE_V7,
+	.cpb	= MAX_CPB_SIZE_V7,
+	.priv	= &mfc_buf_size_v7,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v7 = {
+	.version	= MFC_VERSION_V7,
+	.version_bit	= MFC_V7_BIT,
+	.port_num	= MFC_NUM_PORTS_V7,
+	.buf_size	= &buf_size_v7,
+	.fw_name[0]     = "s5p-mfc-v7.fw",
+	.clk_names	= {"mfc"},
+	.num_clocks	= 1,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v7_3250 = {
+	.version        = MFC_VERSION_V7,
+	.version_bit    = MFC_V7_BIT,
+	.port_num       = MFC_NUM_PORTS_V7,
+	.buf_size       = &buf_size_v7,
+	.fw_name[0]     = "s5p-mfc-v7.fw",
+	.clk_names      = {"mfc", "sclk_mfc"},
+	.num_clocks     = 2,
+};
+
+static struct s5p_mfc_buf_size_v6 mfc_buf_size_v8 = {
+	.dev_ctx	= MFC_CTX_BUF_SIZE_V8,
+	.h264_dec_ctx	= MFC_H264_DEC_CTX_BUF_SIZE_V8,
+	.other_dec_ctx	= MFC_OTHER_DEC_CTX_BUF_SIZE_V8,
+	.h264_enc_ctx	= MFC_H264_ENC_CTX_BUF_SIZE_V8,
+	.other_enc_ctx	= MFC_OTHER_ENC_CTX_BUF_SIZE_V8,
+};
+
+static struct s5p_mfc_buf_size buf_size_v8 = {
+	.fw	= MAX_FW_SIZE_V8,
+	.cpb	= MAX_CPB_SIZE_V8,
+	.priv	= &mfc_buf_size_v8,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v8 = {
+	.version	= MFC_VERSION_V8,
+	.version_bit	= MFC_V8_BIT,
+	.port_num	= MFC_NUM_PORTS_V8,
+	.buf_size	= &buf_size_v8,
+	.fw_name[0]     = "s5p-mfc-v8.fw",
+	.clk_names	= {"mfc"},
+	.num_clocks	= 1,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v8_5433 = {
+	.version	= MFC_VERSION_V8,
+	.version_bit	= MFC_V8_BIT,
+	.port_num	= MFC_NUM_PORTS_V8,
+	.buf_size	= &buf_size_v8,
+	.fw_name[0]     = "s5p-mfc-v8.fw",
+	.clk_names	= {"pclk", "aclk", "aclk_xiu"},
+	.num_clocks	= 3,
+};
+
+static struct s5p_mfc_buf_size_v6 mfc_buf_size_v10 = {
+	.dev_ctx        = MFC_CTX_BUF_SIZE_V10,
+	.h264_dec_ctx   = MFC_H264_DEC_CTX_BUF_SIZE_V10,
+	.other_dec_ctx  = MFC_OTHER_DEC_CTX_BUF_SIZE_V10,
+	.h264_enc_ctx   = MFC_H264_ENC_CTX_BUF_SIZE_V10,
+	.hevc_enc_ctx   = MFC_HEVC_ENC_CTX_BUF_SIZE_V10,
+	.other_enc_ctx  = MFC_OTHER_ENC_CTX_BUF_SIZE_V10,
+};
+
+static struct s5p_mfc_buf_size buf_size_v10 = {
+	.fw     = MAX_FW_SIZE_V10,
+	.cpb    = MAX_CPB_SIZE_V10,
+	.priv   = &mfc_buf_size_v10,
+};
+
+static struct s5p_mfc_variant mfc_drvdata_v10 = {
+	.version        = MFC_VERSION_V10,
+	.version_bit    = MFC_V10_BIT,
+	.port_num       = MFC_NUM_PORTS_V10,
+	.buf_size       = &buf_size_v10,
+	.fw_name[0]     = "s5p-mfc-v10.fw",
+};
+
+static const struct of_device_id exynos_mfc_match[] = {
+	{
+		.compatible = "samsung,mfc-v5",
+		.data = &mfc_drvdata_v5,
+	}, {
+		.compatible = "samsung,mfc-v6",
+		.data = &mfc_drvdata_v6,
+	}, {
+		.compatible = "samsung,mfc-v7",
+		.data = &mfc_drvdata_v7,
+	}, {
+		.compatible = "samsung,exynos3250-mfc",
+		.data = &mfc_drvdata_v7_3250,
+	}, {
+		.compatible = "samsung,mfc-v8",
+		.data = &mfc_drvdata_v8,
+	}, {
+		.compatible = "samsung,exynos5433-mfc",
+		.data = &mfc_drvdata_v8_5433,
+	}, {
+		.compatible = "samsung,mfc-v10",
+		.data = &mfc_drvdata_v10,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, exynos_mfc_match);
+
+static struct platform_driver s5p_mfc_driver = {
+	.probe		= s5p_mfc_probe,
+	.remove_new	= s5p_mfc_remove,
+	.driver	= {
+		.name	= S5P_MFC_NAME,
+		.pm	= &s5p_mfc_pm_ops,
+		.of_match_table = exynos_mfc_match,
+	},
+};
+
+module_platform_driver(s5p_mfc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
+MODULE_DESCRIPTION("Samsung S5P Multi Format Codec V4L2 driver");
+