[PATCH] [media] v4l2: Add support for go2001 PCI codec driver

[Thierry Escande]

This patch adds support for the go2001 PCI codec driver. This hardware
is present on ChromeOS based devices like the Acer ChromeBox and Acer/LG
ChromeBase 24 devices.

This driver comes from the ChromeOS v3.18 kernel tree and has been
modified to support vb2_buffer restructuring introduced in Linux v4.4.

This driver is originally developed by:
 Pawel Osciak <posciak@xxxxxxxxxxxx>
 Ville-Mikko Rautio <vmr@xxxxxxxxxxxx>
 henryhsu <henryhsu@xxxxxxxxxxxx>
 Wu-Cheng Li <wuchengli@xxxxxxxxxxxx>

Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
---
 drivers/media/pci/Kconfig                |    2 +
 drivers/media/pci/Makefile               |    1 +
 drivers/media/pci/go2001/Kconfig         |   11 +
 drivers/media/pci/go2001/Makefile        |    2 +
 drivers/media/pci/go2001/go2001.h        |  331 ++++
 drivers/media/pci/go2001/go2001_driver.c | 2563 ++++++++++++++++++++++++++++++
 drivers/media/pci/go2001/go2001_hw.c     | 1365 ++++++++++++++++
 drivers/media/pci/go2001/go2001_hw.h     |   55 +
 drivers/media/pci/go2001/go2001_proto.h  |  359 +++++
 9 files changed, 4689 insertions(+)
 create mode 100644 drivers/media/pci/go2001/Kconfig
 create mode 100644 drivers/media/pci/go2001/Makefile
 create mode 100644 drivers/media/pci/go2001/go2001.h
 create mode 100644 drivers/media/pci/go2001/go2001_driver.c
 create mode 100644 drivers/media/pci/go2001/go2001_hw.c
 create mode 100644 drivers/media/pci/go2001/go2001_hw.h
 create mode 100644 drivers/media/pci/go2001/go2001_proto.h

diff --git a/drivers/media/pci/Kconfig b/drivers/media/pci/Kconfig
index da28e68..837681e 100644
--- a/drivers/media/pci/Kconfig
+++ b/drivers/media/pci/Kconfig
@@ -54,5 +54,7 @@ source "drivers/media/pci/smipcie/Kconfig"
 source "drivers/media/pci/netup_unidvb/Kconfig"
 endif
 
+source "drivers/media/pci/go2001/Kconfig"
+
 endif #MEDIA_PCI_SUPPORT
 endif #PCI
diff --git a/drivers/media/pci/Makefile b/drivers/media/pci/Makefile
index a7e8af0..58639b7 100644
--- a/drivers/media/pci/Makefile
+++ b/drivers/media/pci/Makefile
@@ -32,3 +32,4 @@ obj-$(CONFIG_STA2X11_VIP) += sta2x11/
 obj-$(CONFIG_VIDEO_SOLO6X10) += solo6x10/
 obj-$(CONFIG_VIDEO_COBALT) += cobalt/
 obj-$(CONFIG_VIDEO_TW5864) += tw5864/
+obj-$(CONFIG_VIDEO_GO2001) += go2001/
diff --git a/drivers/media/pci/go2001/Kconfig b/drivers/media/pci/go2001/Kconfig
new file mode 100644
index 0000000..c7b5149
--- /dev/null
+++ b/drivers/media/pci/go2001/Kconfig
@@ -0,0 +1,11 @@
+config VIDEO_GO2001
+	tristate "GO2001 codec driver"
+	depends on VIDEO_V4L2 && PCI
+	select VIDEOBUF2_DMA_SG
+	---help---
+	  This driver supports the GO2001 PCI hardware codec. This codec
+	  is present on ChromeOS based devices like the Acer ChromeBox
+	  and ChromeBase 24 and LG ChromeBase as well.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called go2001.
diff --git a/drivers/media/pci/go2001/Makefile b/drivers/media/pci/go2001/Makefile
new file mode 100644
index 0000000..20bad18
--- /dev/null
+++ b/drivers/media/pci/go2001/Makefile
@@ -0,0 +1,2 @@
+go2001-objs	:= go2001_driver.o go2001_hw.o
+obj-$(CONFIG_VIDEO_GO2001) += go2001.o
diff --git a/drivers/media/pci/go2001/go2001.h b/drivers/media/pci/go2001/go2001.h
new file mode 100644
index 0000000..0e5ccfd
--- /dev/null
+++ b/drivers/media/pci/go2001/go2001.h
@@ -0,0 +1,331 @@
+/*
+ *  go2001 - GO2001 codec driver.
+ *
+ *  Author : Pawel Osciak <posciak@xxxxxxxxxxxx>
+ *
+ *  Copyright (C) 2017 Google, Inc.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MEDIA_PCI_GO2001_GO2001_H_
+#define _MEDIA_PCI_GO2001_GO2001_H_
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+
+#include "go2001_proto.h"
+
+struct go2001_msg {
+	struct list_head list_entry;
+	struct go2001_msg_payload payload;
+};
+
+static inline struct go2001_msg_hdr *msg_to_hdr(struct go2001_msg *msg)
+{
+	return &msg->payload.hdr;
+}
+
+static inline void *msg_to_param(struct go2001_msg *msg)
+{
+	return msg->payload.param;
+}
+
+struct go2001_msg_ring {
+	struct go2001_msg_ring_desc desc;
+	void __iomem *desc_iomem;
+	void __iomem *data_iomem;
+	spinlock_t lock;
+};
+
+struct go2001_hw_inst {
+	struct list_head inst_entry;
+
+	u32 session_id;
+	u32 sequence_id;
+	u32 last_reply_seq_id;
+
+	struct list_head pending_list;
+};
+
+struct go2001_dev {
+	struct pci_dev *pdev;
+	struct v4l2_device v4l2_dev;
+	struct video_device dec_vdev;
+	struct video_device enc_vdev;
+
+	struct mutex lock;
+
+	void __iomem *iomem;
+	size_t iomem_size;
+
+	struct go2001_msg_ring tx_ring;
+	struct go2001_msg_ring rx_ring;
+	size_t max_param_size;
+
+	spinlock_t irqlock;
+	struct list_head inst_list;
+	struct list_head new_inst_list;
+	struct go2001_hw_inst *curr_hw_inst;
+
+	struct list_head ctx_list;
+
+	u32 last_reply_inst_id;
+	u32 last_reply_seq_id;
+	struct go2001_msg last_reply;
+
+	/* Last seq_id for init instance message. */
+	u32 last_init_inst_seq_id;
+	wait_queue_head_t reply_wq;
+
+	struct go2001_hw_inst ctrl_inst;
+	struct completion fw_completion;
+	/* Protected by irqlock */
+	bool fw_loaded;
+	int msgs_in_flight;
+	struct delayed_work watchdog_work;
+
+	/* Protected by lock */
+	bool initialized;
+
+	struct kmem_cache *msg_cache;
+};
+
+enum go2001_codec_mode {
+	CODEC_MODE_DECODER = (1 << 0),
+	CODEC_MODE_ENCODER = (1 << 1),
+};
+
+enum go2001_fmt_type {
+	FMT_TYPE_RAW,
+	FMT_TYPE_CODED,
+};
+
+struct go2001_fmt {
+	enum go2001_fmt_type type;
+	const char *desc;
+	u32 pixelformat;
+	unsigned int num_planes;
+	u32 hw_format;
+	unsigned long codec_modes;
+	/* Minimum pixel alignment for horizontal resolution. */
+	unsigned int h_align;
+	/* Minimum pixel alignment for vertical resolution. */
+	unsigned int v_align;
+	/* Bits per line */
+	unsigned char plane_row_depth[VIDEO_MAX_PLANES];
+	/* Bits per plane */
+	unsigned char plane_depth[VIDEO_MAX_PLANES];
+};
+
+struct go2001_ctrl {
+	u32 id;
+	enum v4l2_ctrl_type type;
+	const char *name;
+	s32 min;
+	s32 max;
+	u32 step;
+	s32 def;
+	u32 flags;
+};
+
+enum go2001_codec_state {
+	UNCOMMITTED,
+	COMMITTED,
+	NEED_HEADER_INFO,
+	RUNNING,
+	PAUSED,
+	RES_CHANGE,
+	ERROR,
+};
+
+struct go2001_frame_info {
+	unsigned int width;
+	unsigned int height;
+	unsigned int coded_width;
+	unsigned int coded_height;
+	unsigned int bytesperline[VIDEO_MAX_PLANES];
+	size_t plane_size[VIDEO_MAX_PLANES];
+};
+
+#define GO2001_REPLY_TIMEOUT_MS		10000
+#define GO2001_WATCHDOG_TIMEOUT_MS	2000
+
+struct go2001_dma_desc {
+	/* DMA address of the map list */
+	dma_addr_t dma_addr;
+	/* Number of entries on the map list */
+	int num_entries;
+	/* CPU address of the map list */
+	struct go2001_mmap_list_entry *mmap_list;
+	/* Size in bytes of the list */
+	size_t list_size;
+	/*
+	 * DMA address of the first entry on the list.
+	 * Used to identify the buffer when passing it to the HW.
+	 */
+	u64 map_addr;
+};
+
+struct go2001_enc_params {
+	u32 bitrate;
+	u32 framerate_num;
+	u32 framerate_denom;
+	bool rc_enable;
+	bool request_keyframe;
+	bool multi_ref_frame_mode;
+	u32 frames_since_intra;
+};
+
+enum go2001_enc_param_change_bit {
+	GO2001_BITRATE_CHANGE,
+	GO2001_FRAMERATE_CHANGE,
+	GO2001_KEYFRAME_REQUESTED,
+	GO2001_PARAM_CHANGE_MAX,
+};
+
+struct go2001_runtime_enc_params {
+	struct go2001_enc_params enc_params;
+	unsigned long changed_mask[BITS_TO_LONGS(GO2001_PARAM_CHANGE_MAX)];
+};
+
+struct go2001_buffer {
+	struct vb2_buffer vb;
+	struct list_head list;
+	struct go2001_dma_desc dma_desc[VIDEO_MAX_PLANES];
+	bool mapped;
+
+	struct go2001_msg *msg;
+
+	struct go2001_runtime_enc_params rt_enc_params;
+	size_t partition_off[VP8_MAX_NUM_PARTITIONS];
+	size_t partition_size[VP8_MAX_NUM_PARTITIONS];
+};
+
+struct go2001_job {
+	struct go2001_buffer *src_buf;
+	struct go2001_buffer *dst_buf;
+};
+
+#define GO2001_MSG_POOL_SIZE	VIDEO_MAX_FRAME
+struct go2001_ctx {
+	struct list_head ctx_entry;
+
+	struct mutex lock;
+	struct v4l2_fh v4l2_fh;
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct go2001_dev *gdev;
+	enum go2001_codec_mode codec_mode;
+
+	struct go2001_fmt *src_fmt;
+	struct go2001_fmt *dst_fmt;
+	struct go2001_frame_info finfo;
+	size_t bitstream_buf_size;
+
+	enum go2001_codec_state state;
+	struct vb2_queue src_vq;
+	struct vb2_queue dst_vq;
+
+	spinlock_t qlock;
+	struct list_head src_buf_q;
+	struct list_head src_resume_q;
+	struct list_head dst_buf_q;
+
+	struct go2001_hw_inst hw_inst;
+
+	/* Currently running job, if any. */
+	struct go2001_job job;
+
+	struct go2001_enc_params enc_params;
+	/* Will be applied to the next source buffer queued. */
+	struct go2001_runtime_enc_params pending_rt_params;
+
+	bool need_resume;
+};
+
+static inline struct go2001_buffer *vb_to_go2001_buf(struct vb2_buffer *vb)
+{
+	return container_of(vb, struct go2001_buffer, vb);
+}
+
+static inline struct go2001_ctx *hw_inst_to_ctx(struct go2001_hw_inst *hw_inst)
+{
+	return container_of(hw_inst, struct go2001_ctx, hw_inst);
+}
+
+static inline bool go2001_has_frame_info(struct go2001_ctx *ctx)
+{
+	if (ctx->codec_mode == CODEC_MODE_DECODER)
+		return ctx->dst_fmt && ctx->finfo.width != 0;
+	else
+		return ctx->src_fmt && ctx->finfo.width != 0;
+}
+
+static inline struct go2001_ctx *fh_to_ctx(struct v4l2_fh *fh)
+{
+	return container_of(fh, struct go2001_ctx, v4l2_fh);
+}
+
+static inline struct go2001_ctx *ctrl_to_ctx(struct v4l2_ctrl *ctrl)
+{
+	return container_of(ctrl->handler, struct go2001_ctx, ctrl_handler);
+}
+
+extern unsigned int go2001_debug_level;
+extern unsigned int go2001_fw_debug_level;
+
+#define go2001_err_nodev(fmt, args...) \
+	pr_err("%s:%d " fmt, __func__, __LINE__, ##args)
+
+#define go2001_err(gdev, fmt, args...) \
+	dev_err(&(gdev)->pdev->dev, "%s:%d " fmt, __func__, __LINE__, ##args)
+
+#define go2001_info(gdev, fmt, args...) \
+	dev_info(&(gdev)->pdev->dev, "%s:%d " fmt, __func__, __LINE__, ##args)
+
+#define go2001_dbg(gdev, level, fmt, args...)				\
+	do {								\
+		if (go2001_debug_level >= (level))			\
+			dev_info(&(gdev)->pdev->dev, "%s:%d " fmt,	\
+				 __func__, __LINE__, ##args);		\
+	} while (0)
+
+#define go2001_trace(gdev) \
+	go2001_dbg((gdev), 5, "%s\n", __func__)
+
+static inline void go2001_set_ctx_state(struct go2001_ctx *ctx,
+					enum go2001_codec_state state)
+{
+	go2001_dbg(ctx->gdev, 2, "ctx %p state change %d->%d\n", ctx,
+		   ctx->state, state);
+	ctx->state = state;
+}
+
+#define GO2001_MIN_NUM_BITSTREAM_BUFFERS	4
+#define GO2001_MIN_NUM_FRAME_BUFFERS		8
+#define GO2001_DEF_BITSTREAM_BUFFER_SIZE	SZ_1M
+#define GO2001_DEF_BITRATE			1000000
+#define GO2001_MAX_FPS				30
+#define GO2001_DEF_RC_ENABLE			1
+#define GO2001_VPX_MACROBLOCK_SIZE		16
+
+#endif /* _MEDIA_PCI_GO2001_GO2001_H_ */
diff --git a/drivers/media/pci/go2001/go2001_driver.c b/drivers/media/pci/go2001/go2001_driver.c
new file mode 100644
index 0000000..991e41c
--- /dev/null
+++ b/drivers/media/pci/go2001/go2001_driver.c
@@ -0,0 +1,2563 @@
+/*
+ *  go2001 - GO2001 codec driver.
+ *
+ *  Author : Pawel Osciak <posciak@xxxxxxxxxxxx>
+ *
+ *  Copyright (C) 2017 Google, Inc.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kmod.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-sg.h>
+
+#include "go2001.h"
+#include "go2001_hw.h"
+
+#define DRIVER_NAME "go2001"
+#define VDEV_NAME_DEC (DRIVER_NAME "-dec")
+#define VDEV_NAME_ENC (DRIVER_NAME "-enc")
+
+#define DST_QUEUE_OFF_BASE	BIT(30)
+
+unsigned int go2001_debug_level;
+unsigned int go2001_fw_debug_level;
+
+module_param(go2001_debug_level, uint, 0644);
+MODULE_PARM_DESC(go2001_debug_level, " verbosity level for debug messages.");
+
+module_param(go2001_fw_debug_level, uint, 0644);
+MODULE_PARM_DESC(go2001_fw_debug_level, " verbosity level for firmware debug messages.");
+
+static void go2001_cleanup_queue(struct go2001_ctx *ctx,
+				 struct list_head *buf_list)
+{
+	struct go2001_buffer *buf, *buf_tmp;
+	int i;
+
+	assert_spin_locked(&ctx->qlock);
+
+	list_for_each_entry_safe(buf, buf_tmp, buf_list, list) {
+		list_del(&buf->list);
+		for (i = 0; i < buf->vb.num_planes; ++i)
+			vb2_set_plane_payload(&buf->vb, i, 0);
+		vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+	}
+}
+
+static void go2001_ctx_error_locked(struct go2001_ctx *ctx)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	unsigned long flags;
+
+	assert_spin_locked(&gdev->irqlock);
+
+	go2001_err(ctx->gdev, "Setting error state for ctx %p, session_id %d\n",
+		   ctx, ctx->hw_inst.session_id);
+
+	go2001_cancel_hw_inst_locked(gdev, &ctx->hw_inst);
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+
+	go2001_set_ctx_state(ctx, ERROR);
+	memset(&ctx->job, 0, sizeof(struct go2001_job));
+	go2001_cleanup_queue(ctx, &ctx->src_buf_q);
+	go2001_cleanup_queue(ctx, &ctx->src_resume_q);
+	go2001_cleanup_queue(ctx, &ctx->dst_buf_q);
+
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+}
+
+static void go2001_cancel_all_contexts(struct go2001_dev *gdev)
+{
+	unsigned long flags;
+	struct go2001_ctx *ctx;
+
+	go2001_trace(gdev);
+
+	WARN_ON(!mutex_is_locked(&gdev->lock));
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+
+	go2001_cancel_all_hw_inst_locked(gdev);
+
+	list_for_each_entry(ctx, &gdev->ctx_list, ctx_entry)
+		go2001_ctx_error_locked(ctx);
+
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+	wake_up_all(&gdev->reply_wq);
+}
+
+static struct go2001_fmt formats[] = {
+	{
+		.type = FMT_TYPE_RAW,
+		.desc = "32bit ARGB",
+		.pixelformat = V4L2_PIX_FMT_RGB32,
+		.num_planes = 1,
+		.hw_format = GO2001_FMT_RGB888,
+		.codec_modes = CODEC_MODE_DECODER | CODEC_MODE_ENCODER,
+		.h_align = 1,
+		.v_align = 1,
+		.plane_row_depth = { 32 },
+		.plane_depth = { 32 },
+	},
+	{
+		.type = FMT_TYPE_RAW,
+		.desc = "NV12, Y/CbCr interleaved",
+		.pixelformat = V4L2_PIX_FMT_NV12M,
+		.num_planes = 2,
+		.hw_format = GO2001_FMT_YUV420_SEMIPLANAR,
+		.codec_modes = CODEC_MODE_DECODER | CODEC_MODE_ENCODER,
+		.h_align = 4,
+		.v_align = 2,
+		.plane_row_depth = { 8, 8 },
+		.plane_depth = { 8, 4 },
+	},
+	{
+		.type = FMT_TYPE_RAW,
+		.desc = "YUV420M, Y, Cb, Cr 3-planar",
+		.pixelformat = V4L2_PIX_FMT_YUV420M,
+		.num_planes = 3,
+		.hw_format = GO2001_FMT_YUV420_PLANAR,
+		.codec_modes = CODEC_MODE_ENCODER,
+		.h_align = 4,
+		.v_align = 2,
+		.plane_row_depth = { 8, 4, 4 },
+		.plane_depth = { 8, 2, 2 },
+	},
+	{
+		.type = FMT_TYPE_CODED,
+		.desc = "VP8 raw stream",
+		.pixelformat = V4L2_PIX_FMT_VP8,
+		.num_planes = 1,
+		.hw_format = GO2001_FMT_VP8,
+		.codec_modes = CODEC_MODE_DECODER | CODEC_MODE_ENCODER,
+	},
+};
+
+static struct go2001_ctrl go2001_dec_ctrls[] = {
+	{
+		.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
+		.min = 1,
+		.max = 32,
+		.step = 1,
+		.def = 8,
+	},
+};
+
+static struct go2001_ctrl go2001_enc_ctrls[] = {
+	{
+		.id = V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE,
+		.type = V4L2_CTRL_TYPE_BOOLEAN,
+		.min = 1,
+		.max = 1,
+		.step = 1,
+		.def = GO2001_DEF_RC_ENABLE,
+	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_BITRATE,
+		.type = V4L2_CTRL_TYPE_INTEGER,
+		.min = 10000,
+		.max = 40000000,
+		.step = 1,
+		.def = GO2001_DEF_BITRATE,
+	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME,
+		.type = V4L2_CTRL_TYPE_BUTTON,
+	},
+};
+
+static struct go2001_fmt *go2001_find_fmt(struct go2001_ctx *ctx,
+					  __u32 pixelformat)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+		if (formats[i].pixelformat == pixelformat &&
+		    (ctx->codec_mode & formats[i].codec_modes))
+			return &formats[i];
+	}
+
+	go2001_dbg(ctx->gdev, 1, "Unsupported format %d.\n", pixelformat);
+
+	return NULL;
+}
+
+struct vb2_queue *go2001_get_vq(struct go2001_ctx *ctx, enum v4l2_buf_type type)
+{
+	return V4L2_TYPE_IS_OUTPUT(type) ? &ctx->src_vq : &ctx->dst_vq;
+}
+
+static int go2001_querycap(struct file *file, void *priv,
+			   struct v4l2_capability *cap)
+{
+	struct go2001_dev *gdev = video_drvdata(file);
+
+	strlcpy(cap->driver, DRIVER_NAME, sizeof(cap->driver));
+	strlcpy(cap->card, "GO2001 PCIe codec", sizeof(cap->card));
+	snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
+		 pci_name(gdev->pdev));
+
+	cap->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING |
+			   V4L2_CAP_VIDEO_CAPTURE_MPLANE |
+			   V4L2_CAP_VIDEO_OUTPUT_MPLANE;
+	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+	return 0;
+}
+
+static int go2001_queue_setup(struct vb2_queue *q, unsigned int *num_buffers,
+			      unsigned int *num_planes, unsigned int sizes[],
+			      struct device *alloc_devs[])
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(q);
+	struct go2001_fmt *f;
+	int i;
+
+	go2001_trace(ctx->gdev);
+
+	f = V4L2_TYPE_IS_OUTPUT(q->type) ? ctx->src_fmt : ctx->dst_fmt;
+	if (!f) {
+		go2001_err(ctx->gdev, "Format(s) not selected\n");
+		return -EINVAL;
+	}
+
+	if (f->type == FMT_TYPE_CODED) {
+		if (*num_buffers < GO2001_MIN_NUM_BITSTREAM_BUFFERS)
+			*num_buffers = GO2001_MIN_NUM_BITSTREAM_BUFFERS;
+		*num_planes = 1;
+		sizes[0] = ctx->bitstream_buf_size;
+	} else if (go2001_has_frame_info(ctx)) {
+		if (*num_buffers < GO2001_MIN_NUM_FRAME_BUFFERS)
+			*num_buffers = GO2001_MIN_NUM_FRAME_BUFFERS;
+		*num_planes = f->num_planes;
+		for (i = 0; i < f->num_planes; ++i)
+			sizes[i] = ctx->finfo.plane_size[i];
+	} else {
+		go2001_err(ctx->gdev, "Invalid state\n");
+		return -EINVAL;
+	}
+
+	go2001_dbg(ctx->gdev, 2, "Num buffers: %d, planes: %d\n", *num_buffers,
+		   *num_planes);
+
+	for (i = 0; i < f->num_planes; ++i)
+		go2001_dbg(ctx->gdev, 2, "Plane %d, size: %d\n", i, sizes[i]);
+
+	return 0;
+}
+
+static int go2001_buf_init(struct vb2_buffer *vb)
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct go2001_dev *gdev = ctx->gdev;
+	struct device *dev = &gdev->pdev->dev;
+	struct go2001_buffer *gbuf = vb_to_go2001_buf(vb);
+	struct go2001_dma_desc *dma_desc;
+	struct go2001_mmap_list_entry *mmap_list;
+	enum dma_data_direction dir;
+	struct scatterlist *sg;
+	struct sg_table *sgt;
+	u64 dma_addr;
+	u32 dma_len;
+	int plane, sgi;
+	int ret;
+
+	go2001_trace(gdev);
+
+	if (WARN_ON(gbuf->mapped))
+		return -EINVAL;
+
+	dir = V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) ?
+	      DMA_TO_DEVICE :
+	      DMA_FROM_DEVICE;
+
+	for (plane = 0; plane < vb->num_planes; ++plane) {
+		dma_desc = &gbuf->dma_desc[plane];
+		WARN_ON(!IS_ALIGNED(dma_desc->map_addr, 16));
+
+		sgt = vb2_dma_sg_plane_desc(vb, plane);
+
+		if (!IS_ALIGNED(sgt->sgl->offset, 8) ||
+		    !IS_ALIGNED(vb2_plane_size(vb, plane), 8)) {
+			go2001_err(gdev, "Plane address/size not aligned %d/%zu\n",
+				   sgt->sgl->offset, vb2_plane_size(vb, plane));
+
+			ret = -EINVAL;
+			goto err;
+		}
+
+		dma_desc->num_entries = sgt->nents;
+		dma_desc->list_size = dma_desc->num_entries *
+				      sizeof(struct go2001_mmap_list_entry);
+		dma_desc->mmap_list = dma_alloc_coherent(dev,
+							 dma_desc->list_size,
+							 &dma_desc->dma_addr,
+							 GFP_KERNEL);
+		if (!dma_desc->mmap_list) {
+			go2001_err(gdev, "Failed allocating HW memory map\n");
+
+			ret = -ENOMEM;
+			goto err;
+		}
+
+		go2001_dbg(gdev, 3, "Plane %d: mmap list size: %zu\n", plane,
+			   dma_desc->list_size);
+
+		mmap_list = dma_desc->mmap_list;
+		for_each_sg(sgt->sgl, sg, dma_desc->num_entries, sgi) {
+			dma_addr = sg_dma_address(sg);
+			dma_len = sg_dma_len(sg);
+
+			mmap_list[sgi].dma_addr = cpu_to_le64(dma_addr);
+			mmap_list[sgi].size = cpu_to_le32(dma_len);
+
+			go2001_dbg(gdev, 4, "Chunk %d: 0x%08llx, size %d\n",
+				   sgi, dma_addr, dma_len);
+		}
+	}
+
+	ret = go2001_map_buffer(ctx, gbuf);
+	if (ret) {
+		go2001_err(ctx->gdev, "Failed mapping buffer in HW\n");
+		goto err;
+	}
+
+	return 0;
+
+err:
+	for (; plane > 0; --plane) {
+		dma_desc = &gbuf->dma_desc[plane - 1];
+		dma_free_coherent(dev, dma_desc->list_size, dma_desc->mmap_list,
+				  dma_desc->dma_addr);
+		memset(dma_desc, 0, sizeof(struct go2001_dma_desc));
+	}
+
+	return ret;
+}
+
+static int go2001_buf_prepare(struct vb2_buffer *vb)
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct go2001_buffer *gbuf = vb_to_go2001_buf(vb);
+
+	return go2001_prepare_gbuf(ctx, gbuf,
+				   V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type));
+}
+
+static void go2001_buf_finish(struct vb2_buffer *vb)
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct go2001_buffer *gbuf = vb_to_go2001_buf(vb);
+	size_t plane_size;
+	void *vaddr, *ptr;
+	int i;
+
+	go2001_finish_gbuf(ctx, gbuf);
+
+	/*
+	 * If this is a CAPTURE encoder buffer, we need to reassemble
+	 * partitions, as there may be gaps between them.
+	 */
+	if (ctx->codec_mode != CODEC_MODE_ENCODER ||
+	    V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type))
+		return;
+
+	plane_size = vb2_plane_size(vb, 0);
+	vaddr = vb2_plane_vaddr(vb, 0);
+	if (!vaddr) {
+		go2001_err(ctx->gdev, "Unable to map buffer\n");
+		return;
+	}
+
+	ptr = vaddr;
+
+	/*
+	 * ith partition resides at partition_off[i] from start of the buffer
+	 * and is of size partition_size[i]. As there may be gaps between
+	 * partitions, slide them back together to remove the gaps.
+	 */
+	for (i = 0; i < VP8_MAX_NUM_PARTITIONS; ++i) {
+		if (gbuf->partition_size[i] == 0)
+			break;
+
+		if (gbuf->partition_off[i] + gbuf->partition_size[i] >
+		    plane_size) {
+			go2001_err(ctx->gdev, "Invalid partition %d info, off: 0x%zx, size: %zu, plane_size: %zu\n",
+				   i, gbuf->partition_off[i],
+				   gbuf->partition_size[i], plane_size);
+
+			return;
+		}
+
+		if (ptr != vaddr + gbuf->partition_off[i])
+			memmove(ptr, vaddr + gbuf->partition_off[i],
+				gbuf->partition_size[i]);
+
+		ptr += gbuf->partition_size[i];
+	}
+}
+
+static void go2001_buf_cleanup(struct vb2_buffer *vb)
+{
+	struct go2001_buffer *gbuf = vb_to_go2001_buf(vb);
+	struct go2001_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+	struct go2001_dev *gdev = ctx->gdev;
+	struct device *dev = &gdev->pdev->dev;
+	struct go2001_dma_desc *dma_desc;
+	enum dma_data_direction dir;
+	int plane;
+
+	dir = V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) ?
+		DMA_TO_DEVICE : DMA_FROM_DEVICE;
+
+	go2001_unmap_buffer(ctx, gbuf);
+
+	/* Clean up regardless of whether unmap in HW succeeded or not. */
+	for (plane = 0; plane < vb->num_planes; ++plane) {
+		dma_desc = &gbuf->dma_desc[plane];
+		if (dma_desc->mmap_list)
+			dma_free_coherent(dev, dma_desc->list_size,
+					  dma_desc->mmap_list,
+					  dma_desc->dma_addr);
+
+		memset(dma_desc, 0, sizeof(struct go2001_dma_desc));
+	}
+}
+
+static int go2001_enc_start_streaming(struct go2001_ctx *ctx,
+				      enum v4l2_buf_type type)
+{
+	struct vb2_queue *q;
+
+	switch (ctx->state) {
+	case COMMITTED:
+	case PAUSED:
+		if (V4L2_TYPE_IS_OUTPUT(type))
+			q = &ctx->dst_vq;
+		else
+			q = &ctx->src_vq;
+
+		if (vb2_is_streaming(q))
+			go2001_set_ctx_state(ctx, RUNNING);
+		break;
+
+	default:
+		go2001_err(ctx->gdev, "Invalid state %d\n", ctx->state);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int go2001_dec_start_streaming(struct go2001_ctx *ctx,
+				      enum v4l2_buf_type type)
+{
+	struct vb2_queue *q;
+
+	if (V4L2_TYPE_IS_OUTPUT(type)) {
+		if (ctx->state == COMMITTED) {
+			go2001_set_ctx_state(ctx, NEED_HEADER_INFO);
+
+			return 0;
+		}
+
+		q = &ctx->dst_vq;
+	} else {
+		q = &ctx->src_vq;
+	}
+
+	if (ctx->state == PAUSED) {
+		if (vb2_is_streaming(q))
+			go2001_set_ctx_state(ctx, RUNNING);
+
+		return 0;
+	}
+
+	go2001_err(ctx->gdev, "Invalid state %d\n", ctx->state);
+
+	return -EINVAL;
+}
+
+static int go2001_start_streaming(struct vb2_queue *q, unsigned int count)
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(q);
+	unsigned long flags;
+	int ret = 0;
+
+	go2001_dbg(ctx->gdev, 2, "for %s queue\n",
+		   V4L2_TYPE_IS_OUTPUT(q->type) ? "OUTPUT" : "CAPTURE");
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+
+	if (ctx->state == ERROR) {
+		go2001_dbg(ctx->gdev, 1, "Instance %p in error state\n", ctx);
+
+		spin_unlock_irqrestore(&ctx->qlock, flags);
+		return -EIO;
+	}
+
+	if (ctx->codec_mode == CODEC_MODE_ENCODER)
+		ret = go2001_enc_start_streaming(ctx, q->type);
+	else
+		ret = go2001_dec_start_streaming(ctx, q->type);
+
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	if (!ret)
+		ret = go2001_schedule_frames(ctx);
+
+	if (ret)
+		go2001_err(ctx->gdev, "Failed to start streaming\n");
+
+	return ret;
+}
+
+static void go2001_stop_streaming(struct vb2_queue *q)
+{
+	struct go2001_ctx *ctx = vb2_get_drv_priv(q);
+	unsigned long flags;
+
+	go2001_dbg(ctx->gdev, 2, "%p for %s queue\n", ctx,
+		   V4L2_TYPE_IS_OUTPUT(q->type) ? "OUTPUT" : "CAPTURE");
+
+	go2001_wait_for_ctx_done(ctx);
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+
+	switch (ctx->state) {
+	case NEED_HEADER_INFO:
+		go2001_set_ctx_state(ctx, COMMITTED);
+		break;
+
+	case RES_CHANGE:
+		if (V4L2_TYPE_IS_OUTPUT(q->type))
+			go2001_set_ctx_state(ctx, PAUSED);
+		break;
+
+	case RUNNING:
+		go2001_set_ctx_state(ctx, PAUSED);
+		break;
+
+	default:
+		break;
+	}
+
+	WARN_ON(ctx->job.src_buf || ctx->job.dst_buf);
+
+	if (V4L2_TYPE_IS_OUTPUT(q->type)) {
+		go2001_cleanup_queue(ctx, &ctx->src_buf_q);
+		go2001_cleanup_queue(ctx, &ctx->src_resume_q);
+	} else {
+		go2001_cleanup_queue(ctx, &ctx->dst_buf_q);
+	}
+
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+}
+
+static void go2001_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_queue *vq = vb->vb2_queue;
+	struct go2001_ctx *ctx = vb2_get_drv_priv(vq);
+	struct go2001_buffer *gbuf = vb_to_go2001_buf(vb);
+	unsigned long flags;
+
+	if (ctx->codec_mode == CODEC_MODE_ENCODER &&
+	    V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
+		gbuf->rt_enc_params = ctx->pending_rt_params;
+		memset(&ctx->pending_rt_params, 0,
+		       sizeof(ctx->pending_rt_params));
+	}
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+
+	if (V4L2_TYPE_IS_OUTPUT(vq->type))
+		list_add_tail(&gbuf->list, &ctx->src_buf_q);
+	else
+		list_add_tail(&gbuf->list, &ctx->dst_buf_q);
+
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	go2001_schedule_frames(ctx);
+}
+
+static const struct vb2_ops go2001_qops = {
+	.queue_setup = go2001_queue_setup,
+
+	.wait_prepare = vb2_ops_wait_prepare,
+	.wait_finish = vb2_ops_wait_finish,
+
+	.buf_init = go2001_buf_init,
+	.buf_prepare = go2001_buf_prepare,
+	.buf_finish = go2001_buf_finish,
+	.buf_cleanup = go2001_buf_cleanup,
+
+	.start_streaming = go2001_start_streaming,
+	.stop_streaming = go2001_stop_streaming,
+
+	.buf_queue = go2001_buf_queue,
+};
+
+static int go2001_init_vb2_queue(struct vb2_queue *q, struct go2001_ctx *ctx,
+				 enum v4l2_buf_type type)
+{
+	q->type = type;
+	q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_USERPTR;
+	q->lock = &ctx->lock;
+	q->ops = &go2001_qops;
+	q->mem_ops = &vb2_dma_sg_memops;
+	q->drv_priv = ctx;
+	q->buf_struct_size = sizeof(struct go2001_buffer);
+	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER && V4L2_TYPE_IS_OUTPUT(type))
+		q->allow_zero_bytesused = 1;
+
+	return vb2_queue_init(q);
+}
+
+static int go2001_dec_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+	/* TODO */
+	return 0;
+}
+
+static int go2001_enc_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+	/* TODO */
+	return 0;
+}
+
+static int go2001_enc_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct go2001_ctx *ctx = ctrl_to_ctx(ctrl);
+
+	go2001_trace(ctx->gdev);
+
+	switch (ctrl->id) {
+	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
+		break;
+
+	case V4L2_CID_MPEG_VIDEO_BITRATE:
+		set_bit(GO2001_BITRATE_CHANGE,
+			ctx->pending_rt_params.changed_mask);
+		ctx->pending_rt_params.enc_params.bitrate = ctrl->val;
+		go2001_dbg(ctx->gdev, 2, "Bitrate changed to %d bps.\n",
+			   ctx->pending_rt_params.enc_params.bitrate);
+		break;
+
+	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
+		set_bit(GO2001_KEYFRAME_REQUESTED,
+			ctx->pending_rt_params.changed_mask);
+		ctx->pending_rt_params.enc_params.request_keyframe = true;
+		go2001_dbg(ctx->gdev, 2, "Keyframe requested.\n");
+		break;
+
+	default:
+		go2001_dbg(ctx->gdev, 1, "Unsupported control id=%d, ignoring.\n",
+			   ctrl->id);
+		break;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops go2001_dec_ctrl_ops = {
+	.g_volatile_ctrl = go2001_dec_g_volatile_ctrl,
+};
+
+static const struct v4l2_ctrl_ops go2001_enc_ctrl_ops = {
+	.s_ctrl = go2001_enc_s_ctrl,
+	.g_volatile_ctrl = go2001_enc_g_volatile_ctrl,
+};
+
+static int go2001_init_ctrl_handler(struct go2001_ctx *ctx)
+{
+	struct v4l2_ctrl_handler *hdl = &ctx->ctrl_handler;
+	const struct v4l2_ctrl_ops *ops;
+	struct go2001_ctrl *ctrls;
+	struct go2001_ctrl *ctrl;
+	int num_ctrls;
+	int ret;
+	int i;
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER) {
+		ctrls = go2001_dec_ctrls;
+		num_ctrls = ARRAY_SIZE(go2001_dec_ctrls);
+		ops = &go2001_dec_ctrl_ops;
+	} else {
+		ctrls = go2001_enc_ctrls;
+		num_ctrls = ARRAY_SIZE(go2001_enc_ctrls);
+		ops = &go2001_enc_ctrl_ops;
+	}
+
+	ret = v4l2_ctrl_handler_init(hdl, num_ctrls);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < num_ctrls; ++i) {
+		ctrl = &ctrls[i];
+		if (V4L2_CTRL_DRIVER_PRIV(ctrl->id)) {
+			struct v4l2_ctrl_config cfg;
+
+			memset(&cfg, 0, sizeof(struct v4l2_ctrl_config));
+			cfg.ops = ops;
+			cfg.id = ctrl->id;
+			cfg.name = ctrl->name;
+			cfg.type = ctrl->type;
+			cfg.min = ctrl->min;
+			cfg.max = ctrl->max;
+			cfg.def = ctrl->def;
+			cfg.step = ctrl->step;
+			cfg.flags = ctrl->flags;
+
+			v4l2_ctrl_new_custom(hdl, &cfg, NULL);
+		} else {
+			v4l2_ctrl_new_std(hdl, ops, ctrl->id, ctrl->min,
+					  ctrl->max, ctrl->step, ctrl->def);
+		}
+	}
+
+	ret = hdl->error;
+	if (ret)
+		v4l2_ctrl_handler_free(hdl);
+	else
+		ctx->v4l2_fh.ctrl_handler = hdl;
+
+	return ret;
+}
+
+static int go2001_init_ctx(struct go2001_dev *gdev, struct go2001_ctx *ctx,
+			   struct file *file, struct video_device *vdev,
+			   enum go2001_codec_mode mode)
+{
+	int ret;
+
+	ctx->gdev = gdev;
+	ctx->codec_mode = mode;
+
+	mutex_init(&ctx->lock);
+	spin_lock_init(&ctx->qlock);
+	INIT_LIST_HEAD(&ctx->src_buf_q);
+	INIT_LIST_HEAD(&ctx->src_resume_q);
+	INIT_LIST_HEAD(&ctx->dst_buf_q);
+	v4l2_fh_init(&ctx->v4l2_fh, vdev);
+	ctx->state = UNCOMMITTED;
+	go2001_init_hw_inst(&ctx->hw_inst, 0);
+
+	ctx->bitstream_buf_size = GO2001_DEF_BITSTREAM_BUFFER_SIZE;
+	if (ctx->codec_mode == CODEC_MODE_DECODER) {
+		ctx->src_fmt = go2001_find_fmt(ctx, V4L2_PIX_FMT_VP8);
+		ctx->dst_fmt = go2001_find_fmt(ctx, V4L2_PIX_FMT_RGB32);
+	} else {
+		ctx->src_fmt = go2001_find_fmt(ctx, V4L2_PIX_FMT_NV12M);
+		ctx->dst_fmt = go2001_find_fmt(ctx, V4L2_PIX_FMT_VP8);
+		ctx->enc_params.rc_enable = GO2001_DEF_RC_ENABLE;
+		ctx->enc_params.request_keyframe = true;
+		ctx->enc_params.bitrate = GO2001_DEF_BITRATE;
+		ctx->enc_params.framerate_num = GO2001_MAX_FPS;
+		ctx->enc_params.framerate_denom = 1;
+	}
+
+	ret = go2001_init_ctrl_handler(ctx);
+	if (ret)
+		return ret;
+
+	ret = go2001_init_vb2_queue(&ctx->src_vq, ctx,
+				    V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+	if (ret)
+		return ret;
+
+	ret = go2001_init_vb2_queue(&ctx->dst_vq, ctx,
+				    V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+	if (ret)
+		return ret;
+
+	mutex_lock(&gdev->lock);
+	list_add_tail(&ctx->ctx_entry, &gdev->ctx_list);
+	mutex_unlock(&gdev->lock);
+
+	file->private_data = &ctx->v4l2_fh;
+	v4l2_fh_add(&ctx->v4l2_fh);
+
+	return 0;
+}
+
+static void go2001_release_ctx(struct go2001_ctx *ctx)
+{
+	unsigned long flags;
+
+	vb2_queue_release(&ctx->src_vq);
+	vb2_queue_release(&ctx->dst_vq);
+
+	go2001_release_codec(ctx);
+
+	mutex_lock(&ctx->gdev->lock);
+	spin_lock_irqsave(&ctx->qlock, flags);
+	list_del(&ctx->ctx_entry);
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+	mutex_unlock(&ctx->gdev->lock);
+
+	v4l2_fh_del(&ctx->v4l2_fh);
+	v4l2_fh_exit(&ctx->v4l2_fh);
+
+	v4l2_ctrl_handler_free(&ctx->ctrl_handler);
+}
+
+static int go2001_open(struct file *file)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct go2001_dev *gdev = video_drvdata(file);
+	struct go2001_ctx *ctx;
+	enum go2001_codec_mode mode;
+	int ret = 0;
+
+	go2001_trace(gdev);
+
+	mutex_lock(&gdev->lock);
+	if (!gdev->initialized) {
+		ret = go2001_init(gdev);
+		if (!ret)
+			gdev->initialized = true;
+	}
+	mutex_unlock(&gdev->lock);
+
+	if (ret)
+		return ret;
+
+	if (vdev->index == gdev->dec_vdev.index) {
+		mode = CODEC_MODE_DECODER;
+	} else if (vdev->index == gdev->enc_vdev.index) {
+		mode = CODEC_MODE_ENCODER;
+	} else {
+		go2001_err(gdev, "Invalid video node\n");
+		return -ENXIO;
+	}
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ret = go2001_init_ctx(gdev, ctx, file, vdev, mode);
+	if (ret) {
+		go2001_err(gdev, "Failed initializing context\n");
+		kfree(ctx);
+		return ret;
+	}
+
+	go2001_dbg(ctx->gdev, 1, "Opened ctx %p\n", ctx);
+
+	return 0;
+}
+
+static int go2001_release(struct file *file)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	unsigned long flags;
+
+	go2001_dbg(ctx->gdev, 1, "Releasing ctx %p\n", ctx);
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+	go2001_set_ctx_state(ctx, UNCOMMITTED);
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	go2001_wait_for_ctx_done(ctx);
+	go2001_release_ctx(ctx);
+	kfree(ctx);
+
+	return 0;
+}
+
+static unsigned int go2001_poll(struct file *file,
+				struct poll_table_struct *wait)
+{
+	unsigned long req_events = poll_requested_events(wait);
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *src_q = &ctx->src_vq;
+	struct vb2_queue *dst_q = &ctx->dst_vq;
+	struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
+	struct v4l2_fh *fh = &ctx->v4l2_fh;
+	unsigned long flags;
+	unsigned int rc = 0;
+
+	if (v4l2_event_pending(fh))
+		rc = POLLPRI;
+	else if (req_events & POLLPRI)
+		poll_wait(file, &fh->wait, wait);
+
+	if (!(req_events & (POLLOUT | POLLWRNORM | POLLIN | POLLRDNORM)))
+		return rc;
+
+	if ((!vb2_is_streaming(src_q) || list_empty(&src_q->queued_list)) &&
+	    (!vb2_is_streaming(dst_q) || list_empty(&dst_q->queued_list))) {
+		rc |= POLLERR;
+		return rc;
+	}
+
+	poll_wait(file, &src_q->done_wq, wait);
+	poll_wait(file, &dst_q->done_wq, wait);
+
+	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);
+
+	return rc;
+}
+
+static int go2001_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+	int ret;
+
+	if (offset < DST_QUEUE_OFF_BASE) {
+		ret = vb2_mmap(&ctx->src_vq, vma);
+	} else {
+		vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
+		ret = vb2_mmap(&ctx->dst_vq, vma);
+	}
+
+	return ret;
+}
+
+static int go2001_handle_init_reply(struct go2001_dev *gdev,
+				    struct go2001_msg *msg,
+				    u32 status)
+{
+	struct go2001_init_decoder_reply *reply = msg_to_param(msg);
+	struct go2001_hw_inst *hw_inst;
+	struct go2001_ctx *ctx = NULL;
+	int ret = 0;
+
+	list_for_each_entry(hw_inst, &gdev->new_inst_list, inst_entry) {
+		if (hw_inst->sequence_id == gdev->last_reply_seq_id) {
+			ctx = hw_inst_to_ctx(hw_inst);
+			break;
+		}
+	}
+
+	if (!ctx) {
+		go2001_err(gdev, "No ctx awaiting VM_INIT_*, dropping\n");
+		return -EIO;
+	}
+
+	if (gdev->curr_hw_inst == &ctx->hw_inst)
+		gdev->curr_hw_inst = NULL;
+
+	list_del_init(&ctx->hw_inst.inst_entry);
+
+	switch (status) {
+	case GO2001_STATUS_OK:
+		go2001_init_hw_inst(&ctx->hw_inst, reply->session_id);
+		list_add_tail(&ctx->hw_inst.inst_entry, &ctx->gdev->inst_list);
+		break;
+
+	case GO2001_STATUS_RES_NA:
+		ret = -ENOMEM;
+		break;
+
+	case GO2001_STATUS_INVALID_PARAM:
+		ret = -EINVAL;
+		break;
+
+	default:
+		ret = -EIO;
+		break;
+	}
+
+	if (ret)
+		go2001_ctx_error_locked(ctx);
+
+	return ret;
+}
+
+static void go2001_handle_release_instance_reply(struct go2001_ctx *ctx)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+	ctx->hw_inst.session_id = 0;
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+}
+
+static void go2001_calc_finfo(struct go2001_ctx *ctx, struct go2001_fmt *fmt,
+			      struct go2001_frame_info *finfo,
+			      unsigned int width, unsigned int height)
+{
+	int i;
+
+	finfo->width = round_up(width, fmt->h_align);
+	finfo->height = round_up(height, fmt->v_align);
+	finfo->coded_width = round_up(finfo->width, GO2001_VPX_MACROBLOCK_SIZE);
+	finfo->coded_height = round_up(finfo->height,
+				       GO2001_VPX_MACROBLOCK_SIZE);
+
+	go2001_dbg(ctx->gdev, 2, "Visible (coded) resolution: %ux%u (%ux%u)\n",
+		   finfo->width, finfo->height, finfo->coded_width,
+		   finfo->coded_height);
+
+	for (i = 0; i < fmt->num_planes; ++i) {
+		finfo->bytesperline[i] =
+			(finfo->coded_width * fmt->plane_row_depth[i]) / 8;
+		finfo->plane_size[i] = (finfo->coded_width  *
+					finfo->coded_height *
+					fmt->plane_depth[i]) / 8;
+		go2001_dbg(ctx->gdev, 2, "Plane %d: bpl: %u, size: %zu\n",
+			   i, finfo->bytesperline[i], finfo->plane_size[i]);
+	}
+}
+
+static int go2001_handle_new_info(struct go2001_ctx *ctx,
+				  struct go2001_get_info_reply *reply)
+{
+	struct go2001_frame_info *finfo = &ctx->finfo;
+	struct go2001_fmt *fmt;
+
+	fmt = (ctx->codec_mode == CODEC_MODE_DECODER) ?
+	      ctx->dst_fmt : ctx->src_fmt;
+
+	go2001_dbg(ctx->gdev, 2, "HW reports new resolution: %ux%u (%ux%u)\n",
+		   reply->visible_width, reply->visible_height,
+		   reply->coded_width, reply->coded_height);
+
+	go2001_calc_finfo(ctx, fmt, finfo, reply->visible_width,
+			  reply->visible_height);
+
+	if (finfo->width != reply->visible_width ||
+	    finfo->height != reply->visible_height ||
+	    finfo->coded_width != reply->coded_width ||
+	    finfo->coded_height != reply->coded_height) {
+		go2001_err(ctx->gdev, "Invalid resolution from the HW\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int go2001_handle_get_info_reply(struct go2001_ctx *ctx,
+					struct go2001_msg *msg, u32 status)
+{
+	struct go2001_get_info_reply *reply = msg_to_param(msg);
+
+	if (status != GO2001_STATUS_OK)
+		return -EIO;
+
+	return go2001_handle_new_info(ctx, reply);
+}
+
+static int go2001_fill_dst_buf_info(struct go2001_ctx *ctx,
+				    struct go2001_job *job,
+				    struct go2001_msg *reply, bool error)
+{
+	struct vb2_v4l2_buffer *src_vbuf;
+	struct vb2_v4l2_buffer *dst_vbuf;
+	int i;
+
+	src_vbuf = to_vb2_v4l2_buffer(&job->src_buf->vb);
+	dst_vbuf = to_vb2_v4l2_buffer(&job->dst_buf->vb);
+
+	switch (ctx->codec_mode) {
+	case CODEC_MODE_DECODER:
+		for (i = 0; i < dst_vbuf->vb2_buf.num_planes; ++i) {
+			vb2_set_plane_payload(&dst_vbuf->vb2_buf, i,
+					      error ?
+					      0 :
+					      ctx->finfo.plane_size[i]);
+		}
+		break;
+
+	case CODEC_MODE_ENCODER: {
+		struct go2001_empty_buffer_enc_reply *enc_reply =
+							msg_to_param(reply);
+		struct go2001_buffer *gbuf;
+
+		gbuf = vb_to_go2001_buf(&dst_vbuf->vb2_buf);
+
+		memset(gbuf->partition_off, 0, sizeof(gbuf->partition_off));
+		memset(gbuf->partition_size, 0, sizeof(gbuf->partition_size));
+
+		/*
+		 * Partitions may have gaps between them, we will have to
+		 * reassemble the bitstream later in buf_finish. For now just
+		 * save the size and offset of each partition and set the
+		 * payload for the buffer to the sum of sizes (returned in
+		 * enc_reply->payload_size).
+		 */
+		if (enc_reply->payload_size >
+		    vb2_plane_size(&dst_vbuf->vb2_buf, 0) || error) {
+			vb2_set_plane_payload(&dst_vbuf->vb2_buf, 0, 0);
+			return -EINVAL;
+		}
+
+		vb2_set_plane_payload(&dst_vbuf->vb2_buf, 0,
+				      enc_reply->payload_size);
+
+		for (i = 0; i < VP8_MAX_NUM_PARTITIONS; ++i) {
+			gbuf->partition_off[i] = enc_reply->partition_off[i];
+			gbuf->partition_size[i] = enc_reply->partition_size[i];
+		}
+
+		dst_vbuf->flags = 0;
+		if (enc_reply->frame_type ==
+					GO2001_EMPTY_BUF_ENC_FRAME_KEYFRAME)
+			dst_vbuf->flags = V4L2_BUF_FLAG_KEYFRAME;
+		break;
+	}
+	default:
+		WARN_ON(1);
+		break;
+	}
+
+	dst_vbuf->timecode = src_vbuf->timecode;
+	dst_vbuf->vb2_buf.timestamp = src_vbuf->vb2_buf.timestamp;
+
+	go2001_dbg(ctx->gdev, 5, "Returning frame ts=%llu\n",
+		   dst_vbuf->vb2_buf.timestamp);
+
+	return 0;
+}
+
+static int go2001_handle_empty_buffer_reply(struct go2001_ctx *ctx,
+					    struct go2001_msg *msg, u32 status)
+{
+	enum vb2_buffer_state src_state = VB2_BUF_STATE_DONE;
+	enum vb2_buffer_state dst_state = VB2_BUF_STATE_DONE;
+	struct go2001_job *job;
+	struct go2001_buffer *src_buf, *dst_buf;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+	job = &ctx->job;
+	src_buf = job->src_buf;
+	if (!src_buf) {
+		go2001_err(ctx->gdev, "No src buffer!\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	list_del(&src_buf->list);
+
+	dst_buf = job->dst_buf;
+
+	switch (status) {
+	case GO2001_STATUS_NEW_PICTURE_SIZE: {
+		static const struct v4l2_event ev_src_ch = {
+			.type = V4L2_EVENT_SOURCE_CHANGE,
+			.u.src_change.changes =	V4L2_EVENT_SRC_CH_RESOLUTION,
+		};
+		struct go2001_empty_buffer_dec_reply *dec_reply =
+							msg_to_param(msg);
+
+		WARN_ON(ctx->state != NEED_HEADER_INFO &&
+			ctx->state != RUNNING);
+
+		go2001_handle_new_info(ctx, &dec_reply->info);
+		v4l2_event_queue_fh(&ctx->v4l2_fh, &ev_src_ch);
+		go2001_set_ctx_state(ctx, RES_CHANGE);
+		/* Fallthrough */
+	}
+	case GO2001_STATUS_WAITING_PICTURE_SIZE_CHANGED:
+		ctx->need_resume = true;
+		/*
+		 * We will retry this frame after reallocating output buffers.
+		 * Add the source buffer to the resume queue, which will
+		 * be spliced in front of the source queue after reallocation.
+		 */
+		go2001_dbg(ctx->gdev, 3, "Pending buffer %p\n", src_buf);
+		list_add_tail(&src_buf->list, &ctx->src_resume_q);
+		break;
+
+	case GO2001_STATUS_STREAM_ERROR:
+		src_state = VB2_BUF_STATE_ERROR;
+		/* Fallthrough */
+	case GO2001_STATUS_OK:
+		vb2_buffer_done(&src_buf->vb, src_state);
+		if (!dst_buf)
+			break;
+
+		if (go2001_fill_dst_buf_info(ctx, job, msg,
+					     dst_state == VB2_BUF_STATE_ERROR))
+			dst_state = VB2_BUF_STATE_ERROR;
+
+		list_del(&dst_buf->list);
+		vb2_buffer_done(&dst_buf->vb, dst_state);
+		break;
+
+	case GO2001_STATUS_NO_OUTPUT:
+		vb2_buffer_done(&src_buf->vb, src_state);
+		/*
+		 * No output produced, reuse dst_buf for next job
+		 * without returning the buffer to userspace.
+		 */
+		break;
+
+	default:
+		ret = -EIO;
+		break;
+	}
+
+out:
+	job->src_buf = NULL;
+	job->dst_buf = NULL;
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	return ret;
+}
+
+static void go2001_handle_get_version_reply(struct go2001_dev *gdev,
+					    struct go2001_msg *msg)
+{
+	struct go2001_get_version_reply *reply = msg_to_param(msg);
+
+	dev_info(&gdev->pdev->dev, "GO2001 ver: %d/%d, VP8 decoder: %d/%d VP8 encoder: %d/%d, VP9 decoder: %d/%d\n",
+		 reply->hw_ver, reply->sw_ver, reply->vp8dec_hw_ver,
+		 reply->vp8dec_sw_ver, reply->vp8enc_hw_ver,
+		 reply->vp8enc_sw_ver, reply->vp9dec_hw_ver,
+		 reply->vp9dec_sw_ver);
+}
+
+static inline int go2001_handle_reply_default(struct go2001_dev *gdev, u32 type,
+					      u32 status)
+{
+	int ret = 0;
+
+	switch (status) {
+	case GO2001_STATUS_OK:
+		break;
+
+	case GO2001_STATUS_NEW_PICTURE_SIZE:
+	case GO2001_STATUS_WAITING_PICTURE_SIZE_CHANGED:
+	case GO2001_STATUS_STREAM_ERROR:
+	case GO2001_STATUS_NO_OUTPUT:
+		WARN_ON(type != GO2001_VM_EMPTY_BUFFER);
+		go2001_err(gdev, "Unexpected status in reply\n");
+		ret = -EIO;
+		break;
+
+	case GO2001_STATUS_RES_NA:
+		go2001_err(gdev, "Hardware ran out of resources\n");
+		ret = -ENOMEM;
+		break;
+
+	case GO2001_STATUS_INVALID_PARAM:
+		go2001_err(gdev, "Invalid parameters\n");
+		ret = -EINVAL;
+		break;
+
+	default:
+		go2001_err(gdev, "Invalid status in reply\n");
+		ret = -EIO;
+		break;
+	}
+
+	return ret;
+}
+
+static struct go2001_hw_inst *find_hw_inst_by_id_locked(struct go2001_dev *gdev,
+							u32 session_id)
+{
+	struct go2001_hw_inst *hw_inst;
+
+	list_for_each_entry(hw_inst, &gdev->inst_list, inst_entry)
+		if (hw_inst->session_id == session_id)
+			return hw_inst;
+
+	return NULL;
+}
+
+static int go2001_process_reply(struct go2001_dev *gdev,
+				struct go2001_msg *reply)
+{
+	struct go2001_hw_inst *hw_inst;
+	struct go2001_ctx *ctx = NULL;
+	struct go2001_msg_hdr *hdr = msg_to_hdr(reply);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+
+	hw_inst = find_hw_inst_by_id_locked(gdev, hdr->session_id);
+	if (!hw_inst) {
+		go2001_err(gdev, "Got reply for an invalid instance id %d\n",
+			   hdr->session_id);
+		ret = -EIO;
+		goto out;
+	}
+
+	if (hdr->type != GO2001_VM_EVENT_ASSERT	&&
+	    hdr->type != GO2001_VM_EVENT_LOG) {
+		if (WARN_ON(gdev->msgs_in_flight == 0)) {
+			go2001_err(gdev, "Unexpected reply without a request\n");
+			ret = -EIO;
+			goto out;
+		}
+
+		cancel_delayed_work(&gdev->watchdog_work);
+		--gdev->msgs_in_flight;
+		if (gdev->msgs_in_flight > 0)
+			schedule_delayed_work(&gdev->watchdog_work,
+				msecs_to_jiffies(GO2001_WATCHDOG_TIMEOUT_MS));
+
+		go2001_dbg(gdev, 3, "Messages in flight: %d\n",
+			   gdev->msgs_in_flight);
+
+		gdev->last_reply_inst_id = hdr->session_id;
+		gdev->last_reply_seq_id = hdr->sequence_id;
+
+		WARN_ON(hw_inst->last_reply_seq_id + 1 != hdr->sequence_id);
+		hw_inst->last_reply_seq_id = hdr->sequence_id;
+	}
+
+	if (hdr->session_id != 0)
+		ctx = hw_inst_to_ctx(hw_inst);
+
+	switch (hdr->type) {
+	case GO2001_VM_INIT_DECODER:
+	case GO2001_VM_INIT_ENCODER:
+		go2001_dbg(gdev, 5, "VM_INIT reply\n");
+		ret = go2001_handle_init_reply(gdev, reply, hdr->status);
+		break;
+
+	case GO2001_VM_GET_VERSION:
+		go2001_dbg(gdev, 5, "VM_GET_VERSION reply\n");
+		go2001_handle_get_version_reply(gdev, reply);
+		break;
+
+	case GO2001_VM_SET_MMAP:
+	case GO2001_VM_RELEASE_MMAP:
+		go2001_dbg(gdev, 5, "VM_*_MMAP reply\n");
+		ret = go2001_handle_reply_default(gdev, hdr->type, hdr->status);
+		break;
+
+	case GO2001_VM_EMPTY_BUFFER:
+		go2001_dbg(gdev, 5, "VM_EMPTY_BUFFER reply\n");
+		ret = go2001_handle_empty_buffer_reply(ctx, reply, hdr->status);
+		break;
+
+	case GO2001_VM_GET_INFO:
+		go2001_dbg(gdev, 5, "VM_GET_INFO reply\n");
+		ret = go2001_handle_get_info_reply(ctx, reply, hdr->status);
+		break;
+
+	case GO2001_VM_SET_CTRL:
+		go2001_dbg(gdev, 5, "VM_SET_CTRL reply\n");
+		ret = go2001_handle_reply_default(gdev, hdr->type, hdr->status);
+		break;
+
+	case GO2001_VM_RELEASE:
+		go2001_dbg(gdev, 5, "VM_RELEASE reply\n");
+		go2001_handle_release_instance_reply(ctx);
+		break;
+
+	case GO2001_VM_EVENT_ASSERT: {
+		struct go2001_event_assert_reply *a = msg_to_param(reply);
+
+		a->filename[ARRAY_SIZE(a->filename) - 1] = '\0';
+		a->funcname[ARRAY_SIZE(a->funcname) - 1] = '\0';
+		a->expr[ARRAY_SIZE(a->expr) - 1] = '\0';
+		go2001_err(gdev, "FW ASSERT at %s:%d in %s, executing %s\n",
+			   a->filename, a->line_no, a->funcname, a->expr);
+		ret = -EIO;
+		break;
+	}
+
+	case GO2001_VM_EVENT_LOG: {
+		struct go2001_event_log_reply *l = msg_to_param(reply);
+
+		l->data[ARRAY_SIZE(l->data) - 1] = '\0';
+		go2001_err(gdev, "VM_EVENT_LOG: %s\n", l->data);
+		break;
+	}
+
+	case GO2001_VM_SET_LOG_LEVEL: {
+		struct go2001_set_log_level_reply *l = msg_to_param(reply);
+
+		go2001_dbg(gdev, 1, "VM_SET_LOG_LEVEL: %d\n", l->level);
+		ret = go2001_handle_reply_default(gdev, hdr->type, hdr->status);
+		break;
+	}
+
+	default:
+		go2001_err(gdev, "Unexpected reply [%d:%d], type=0x%x\n",
+			   hdr->session_id, hdr->sequence_id, hdr->type);
+		ret = -EIO;
+		break;
+	}
+
+out:
+	if (ret) {
+		go2001_err(gdev, "Error %d for reply [%d:%d] type=0x%x, status=0x%x\n",
+			   ret, hdr->session_id, hdr->sequence_id, hdr->type,
+			   hdr->status);
+		if (ctx)
+			go2001_ctx_error_locked(ctx);
+	}
+
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	if (ctx && ret == 0)
+		go2001_schedule_frames(ctx);
+	/*
+	 * Critical failure only on EIO, otherwise we may be able to continue
+	 * using other instances.
+	 */
+	return ret == -EIO ? ret : 0;
+}
+
+static void go2001_watchdog(struct work_struct *work)
+{
+	int ret;
+	struct go2001_dev *gdev = container_of(to_delayed_work(work),
+					       struct go2001_dev,
+					       watchdog_work);
+
+	go2001_err(gdev, "Watchdog resetting firmware\n");
+
+	mutex_lock(&gdev->lock);
+
+	go2001_cancel_all_contexts(gdev);
+	gdev->msgs_in_flight = 0;
+
+	ret = go2001_init(gdev);
+	if (ret) {
+		gdev->initialized = false;
+		go2001_err(gdev, "Failed resetting firmware\n");
+	}
+
+	mutex_unlock(&gdev->lock);
+}
+
+static irqreturn_t go2001_irq(int irq, void *priv)
+{
+	struct go2001_dev *gdev = priv;
+	struct go2001_msg *reply = &gdev->last_reply;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	if (unlikely(!gdev->fw_loaded)) {
+		gdev->fw_loaded = true;
+		complete(&gdev->fw_completion);
+		spin_unlock_irqrestore(&gdev->irqlock, flags);
+		return IRQ_HANDLED;
+	}
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	while (go2001_get_reply(gdev, reply) == 0) {
+		ret = go2001_process_reply(gdev, reply);
+		wake_up_all(&gdev->reply_wq);
+		if (ret)
+			return IRQ_HANDLED;
+	}
+
+	go2001_send_pending(gdev);
+
+	return IRQ_HANDLED;
+}
+
+static const struct v4l2_file_operations go2001_fops = {
+	.owner = THIS_MODULE,
+	.open = go2001_open,
+	.release = go2001_release,
+	.unlocked_ioctl = video_ioctl2,
+	.poll = go2001_poll,
+	.mmap = go2001_mmap,
+};
+
+static int go2001_enum_fmt(enum go2001_codec_mode codec_mode,
+			   enum go2001_fmt_type type, struct v4l2_fmtdesc *f)
+{
+	struct go2001_fmt *fmt;
+	int num_matched = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+		fmt = &formats[i];
+		if (!(codec_mode & fmt->codec_modes) || fmt->type != type)
+			continue;
+
+		if (num_matched == f->index) {
+			strlcpy(f->description, fmt->desc,
+				sizeof(f->description));
+			f->pixelformat = fmt->pixelformat;
+			if (type == FMT_TYPE_CODED)
+				f->flags = V4L2_FMT_FLAG_COMPRESSED;
+
+			return 0;
+		}
+
+		++num_matched;
+	}
+
+	return -EINVAL;
+}
+
+static int go2001_enum_fmt_cap(struct file *file, void *fh,
+			       struct v4l2_fmtdesc *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER)
+		return go2001_enum_fmt(ctx->codec_mode, FMT_TYPE_RAW, f);
+
+	return go2001_enum_fmt(ctx->codec_mode, FMT_TYPE_CODED, f);
+}
+
+static int go2001_enum_fmt_out(struct file *file, void *fh,
+			       struct v4l2_fmtdesc *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER)
+		return go2001_enum_fmt(ctx->codec_mode, FMT_TYPE_CODED, f);
+
+	return go2001_enum_fmt(ctx->codec_mode, FMT_TYPE_RAW, f);
+}
+
+static int fill_v4l2_format_raw(struct v4l2_format *f, struct go2001_fmt *gfmt,
+				struct go2001_frame_info *finfo)
+{
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+	int i;
+
+	pix_mp->width = finfo->coded_width;
+	pix_mp->height = finfo->coded_height;
+	pix_mp->pixelformat = gfmt->pixelformat;
+	pix_mp->field = V4L2_FIELD_NONE;
+	pix_mp->num_planes = gfmt->num_planes;
+
+	for (i = 0; i < pix_mp->num_planes; ++i) {
+		pix_mp->plane_fmt[i].bytesperline = finfo->bytesperline[i];
+		pix_mp->plane_fmt[i].sizeimage = finfo->plane_size[i];
+	}
+
+	return 0;
+}
+
+static void fill_v4l2_format_coded(struct v4l2_format *f,
+				   struct go2001_fmt *gfmt, size_t buf_size)
+{
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+
+	pix_mp->width = 0;
+	pix_mp->height = 0;
+	pix_mp->pixelformat = gfmt->pixelformat;
+	pix_mp->field = V4L2_FIELD_NONE;
+	pix_mp->num_planes = 1;
+	pix_mp->plane_fmt[0].bytesperline = 0;
+
+	if (buf_size != 0) {
+		pix_mp->plane_fmt[0].sizeimage = buf_size;
+	} else if (pix_mp->plane_fmt[0].sizeimage == 0) {
+		pix_mp->plane_fmt[0].sizeimage =
+					GO2001_DEF_BITSTREAM_BUFFER_SIZE;
+	}
+}
+
+static int go2001_dec_g_fmt_cap(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "Frame info not available yet\n");
+		return -EINVAL;
+	}
+
+	return fill_v4l2_format_raw(f, ctx->dst_fmt, &ctx->finfo);
+}
+
+static int go2001_enc_g_fmt_out(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "Frame info not available yet\n");
+		return -EINVAL;
+	}
+
+	return fill_v4l2_format_raw(f, ctx->dst_fmt, &ctx->finfo);
+}
+
+static int go2001_dec_g_fmt_out(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (!ctx->src_fmt) {
+		go2001_dbg(ctx->gdev, 1, "Format not ready yet\n");
+		return -EINVAL;
+	}
+
+	fill_v4l2_format_coded(f, ctx->src_fmt, ctx->bitstream_buf_size);
+
+	return 0;
+}
+
+static int go2001_enc_g_fmt_cap(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+
+	if (!ctx->dst_fmt) {
+		go2001_dbg(ctx->gdev, 1, "Format not ready yet\n");
+		return -EINVAL;
+	}
+
+	fill_v4l2_format_coded(f, ctx->dst_fmt, ctx->bitstream_buf_size);
+
+	return 0;
+}
+
+static struct go2001_fmt *__go2001_dec_try_fmt_out(struct file *file, void *fh,
+						   struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+	struct go2001_fmt *fmt;
+
+	fmt = go2001_find_fmt(ctx, pix_mp->pixelformat);
+	if (!fmt || fmt->type != FMT_TYPE_CODED)
+		return NULL;
+
+	fill_v4l2_format_coded(f, fmt, 0);
+
+	return fmt;
+}
+
+static int go2001_dec_try_fmt_out(struct file *file, void *fh,
+				  struct v4l2_format *f)
+{
+	struct go2001_fmt *fmt = __go2001_dec_try_fmt_out(file, fh, f);
+
+	return fmt ? 0 : -EINVAL;
+}
+
+static struct go2001_fmt *__go2001_dec_try_fmt_cap(struct file *file, void *fh,
+						   struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+	struct go2001_fmt *fmt;
+
+	/*
+	 * S_FMT on CAPTURE allows setting destination fourcc only,
+	 * resolution is set after parsing headers and comes from the HW.
+	 */
+	fmt = go2001_find_fmt(ctx, pix_mp->pixelformat);
+	if (!fmt || fmt->type != FMT_TYPE_RAW)
+		return NULL;
+
+	return fmt;
+}
+
+static int go2001_dec_try_fmt_cap(struct file *file, void *fh,
+				  struct v4l2_format *f)
+{
+	struct go2001_fmt *fmt = __go2001_dec_try_fmt_cap(file, fh, f);
+
+	return fmt ? 0 : -EINVAL;
+}
+
+static struct go2001_fmt *__go2001_enc_try_fmt_out(struct file *file, void *fh,
+						struct v4l2_format *f,
+						struct go2001_frame_info *finfo)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+	struct go2001_fmt *fmt;
+
+	fmt = go2001_find_fmt(ctx, pix_mp->pixelformat);
+	if (!fmt || fmt->type != FMT_TYPE_RAW)
+		return NULL;
+
+	go2001_calc_finfo(ctx, fmt, finfo, pix_mp->width, pix_mp->height);
+	fill_v4l2_format_raw(f, fmt, finfo);
+
+	return fmt;
+}
+
+static int go2001_enc_try_fmt_out(struct file *file, void *fh,
+				  struct v4l2_format *f)
+{
+	struct go2001_frame_info finfo;
+	struct go2001_fmt *fmt = __go2001_enc_try_fmt_out(file, fh, f, &finfo);
+
+	return fmt ? 0 : -EINVAL;
+}
+
+static struct go2001_fmt *__go2001_enc_try_fmt_cap(struct file *file, void *fh,
+						   struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_fmt *fmt;
+
+	fmt = go2001_find_fmt(ctx, f->fmt.pix_mp.pixelformat);
+	if (!fmt || fmt->type != FMT_TYPE_CODED)
+		return NULL;
+
+	fill_v4l2_format_coded(f, fmt, 0);
+
+	/* TODO: This should allow setting scaling */
+	return fmt;
+}
+
+static int go2001_enc_try_fmt_cap(struct file *file, void *fh,
+				  struct v4l2_format *f)
+{
+	struct go2001_fmt *fmt = __go2001_enc_try_fmt_cap(file, fh, f);
+
+	return fmt ? 0 : -EINVAL;
+}
+
+static int go2001_dec_s_fmt_out(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_fmt *fmt;
+
+	go2001_trace(ctx->gdev);
+
+	if (ctx->state != UNCOMMITTED) {
+		go2001_err(ctx->gdev, "Format cannot be set in this state\n");
+		return -EBUSY;
+	}
+
+	fmt = __go2001_dec_try_fmt_out(file, fh, f);
+	if (!fmt)
+		return -EINVAL;
+
+	ctx->src_fmt = fmt;
+	ctx->bitstream_buf_size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+	go2001_dbg(ctx->gdev, 1, "S_FMT on OUTPUT to %s\n", fmt->desc);
+
+	return 0;
+}
+
+static int go2001_dec_s_fmt_cap(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_fmt *fmt;
+
+	go2001_trace(ctx->gdev);
+
+	if (ctx->state != UNCOMMITTED) {
+		go2001_err(ctx->gdev, "Format cannot be set in this state\n");
+		return -EBUSY;
+	}
+
+	fmt = __go2001_dec_try_fmt_cap(file, fh, f);
+	if (!fmt)
+		return -EINVAL;
+
+	ctx->dst_fmt = fmt;
+	memset(&ctx->finfo, 0, sizeof(ctx->finfo));
+
+	go2001_dbg(ctx->gdev, 1, "S_FMT on CAPTURE to %s\n", fmt->desc);
+
+	return 0;
+}
+
+static int go2001_enc_s_fmt_out(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_frame_info finfo;
+	struct go2001_fmt *fmt;
+
+	go2001_trace(ctx->gdev);
+
+	if (ctx->state != UNCOMMITTED) {
+		go2001_err(ctx->gdev, "Format cannot be set in this state\n");
+		return -EBUSY;
+	}
+
+	fmt = __go2001_enc_try_fmt_out(file, fh, f, &finfo);
+	if (!fmt)
+		return -EINVAL;
+
+	/* At 1280x720 and below go2001 can do three reference frames. */
+	ctx->enc_params.multi_ref_frame_mode =
+				finfo.width * finfo.height <= 1280 * 720;
+
+	ctx->src_fmt = fmt;
+	ctx->finfo = finfo;
+
+	go2001_dbg(ctx->gdev, 1, "S_FMT on OUTPUT to %s, planes:%d\n",
+		   fmt->desc, f->fmt.pix_mp.num_planes);
+
+	return 0;
+}
+
+static int go2001_enc_s_fmt_cap(struct file *file, void *fh,
+				struct v4l2_format *f)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_fmt *fmt;
+
+	go2001_trace(ctx->gdev);
+
+	if (ctx->state != UNCOMMITTED) {
+		go2001_err(ctx->gdev, "Format cannot be set in this state\n");
+		return -EBUSY;
+	}
+
+	fmt = __go2001_enc_try_fmt_cap(file, fh, f);
+	if (!fmt)
+		return -EINVAL;
+
+	ctx->dst_fmt = fmt;
+	ctx->bitstream_buf_size = f->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+	go2001_dbg(ctx->gdev, 1, "S_FMT on CAPTURE to %s\n", fmt->desc);
+
+	return 0;
+}
+
+static int go2001_enc_g_crop(struct file *file, void *fh, struct v4l2_crop *c)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_frame_info *finfo = &ctx->finfo;
+
+	go2001_trace(ctx->gdev);
+
+	if (!V4L2_TYPE_IS_OUTPUT(c->type)) {
+		go2001_err(ctx->gdev, "G_CROP on CAPTURE for encoder unsupported\n");
+		return -EINVAL;
+	}
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "Frame info not available yet\n");
+		return -EINVAL;
+	}
+
+	c->c.left = 0;
+	c->c.top = 0;
+	c->c.width = finfo->width;
+	c->c.height = finfo->height;
+	go2001_dbg(ctx->gdev, 2, "Crop: (%d, %d) -> (%u, %u)\n",
+		   c->c.left, c->c.top, c->c.width, c->c.height);
+
+	return 0;
+}
+
+static int go2001_enc_s_crop(struct file *file, void *fh,
+			     const struct v4l2_crop *c)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_frame_info *finfo = &ctx->finfo;
+	int aligned_w, aligned_h;
+	struct go2001_fmt *fmt;
+
+	go2001_trace(ctx->gdev);
+
+	if (!V4L2_TYPE_IS_OUTPUT(c->type)) {
+		go2001_err(ctx->gdev, "Crop can only be set on the OUTPUT queue\n");
+		return -EINVAL;
+	}
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "Crop must be set after setting format\n");
+		return -EINVAL;
+	}
+
+	fmt = ctx->src_fmt;
+
+	aligned_w = round_up(c->c.width, fmt->h_align);
+	aligned_h = round_up(c->c.height, fmt->v_align);
+
+	if (finfo->width != c->c.width || finfo->height != c->c.height) {
+		go2001_dbg(ctx->gdev, 1, "Adjusted crop from (%d, %d) to (%d, %d)\n",
+			   c->c.width, c->c.height, aligned_w, aligned_h);
+	}
+
+	if (c->c.left != 0 || c->c.top != 0 || aligned_w > finfo->coded_width ||
+	    aligned_h > finfo->coded_height) {
+		go2001_err(ctx->gdev, "Invalid crop (%d, %d) -> (%u, %u) for coded size %ux%u\n",
+			   c->c.left, c->c.top, aligned_w, aligned_h,
+			   finfo->coded_width, finfo->coded_height);
+		return -EINVAL;
+	}
+
+	finfo->width = aligned_w;
+	finfo->height = aligned_h;
+	go2001_dbg(ctx->gdev, 2, "Visible size set to %ux%u\n",
+		   finfo->width, finfo->height);
+	return 0;
+}
+
+static int go2001_dec_g_crop(struct file *file, void *fh, struct v4l2_crop *c)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct go2001_frame_info *finfo = &ctx->finfo;
+
+	go2001_trace(ctx->gdev);
+
+	if (V4L2_TYPE_IS_OUTPUT(c->type)) {
+		go2001_err(ctx->gdev, "G_CROP on OUTPUT for decoder unsupported\n");
+		return -EINVAL;
+	}
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_dbg(ctx->gdev, 1, "Frame info not ready\n");
+		return -EINVAL;
+	}
+
+	c->c.left = 0;
+	c->c.top = 0;
+	c->c.width = finfo->width;
+	c->c.height = finfo->height;
+	go2001_dbg(ctx->gdev, 2, "Crop: (%d, %d) -> (%u, %u)\n",
+		   c->c.left, c->c.top, c->c.width, c->c.height);
+
+	return 0;
+}
+
+static int go2001_enc_s_parm(struct file *file, void *fh,
+			     struct v4l2_streamparm *p)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct v4l2_fract *timeperframe;
+	int fps;
+
+	go2001_trace(ctx->gdev);
+
+	if (p->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+		return -EINVAL;
+
+	timeperframe = &p->parm.output.timeperframe;
+	if (timeperframe->numerator == 0 || timeperframe->denominator == 0) {
+		go2001_err(ctx->gdev, "Invalid values for timeperframe\n");
+		return -EINVAL;
+	}
+
+	/* For now just normalize to 1/x sec/frame. */
+	fps = timeperframe->denominator / timeperframe->numerator;
+	fps = max(1, fps);
+	ctx->pending_rt_params.enc_params.framerate_num = fps;
+	ctx->pending_rt_params.enc_params.framerate_denom = 1;
+	set_bit(GO2001_FRAMERATE_CHANGE, ctx->pending_rt_params.changed_mask);
+	go2001_dbg(ctx->gdev, 2, "FPS changed to %d\n", fps);
+
+	return 0;
+}
+
+static int go2001_enc_g_parm(struct file *file, void *fh,
+			     struct v4l2_streamparm *p)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(fh);
+	struct v4l2_fract *timeperframe;
+
+	if (p->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
+		return -EINVAL;
+
+	memset(&p->parm, 0, sizeof(p->parm));
+	p->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
+	timeperframe = &p->parm.output.timeperframe;
+	timeperframe->numerator = ctx->enc_params.framerate_denom;
+	timeperframe->denominator = ctx->enc_params.framerate_num;
+
+	return 0;
+}
+
+static int go2001_reqbufs_out(struct go2001_ctx *ctx,
+			      struct v4l2_requestbuffers *rb)
+{
+	struct vb2_queue *vq = &ctx->src_vq;
+	int ret;
+
+	go2001_dbg(ctx->gdev, 3, "count: %d\n", rb->count);
+
+	if (rb->count == 0)
+		return vb2_reqbufs(vq, rb);
+
+	if (!ctx->src_fmt || !ctx->dst_fmt) {
+		go2001_err(ctx->gdev, "Formats not set\n");
+		return -EINVAL;
+	}
+
+	if (ctx->codec_mode == CODEC_MODE_ENCODER &&
+	    !go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "No frame info available yet\n");
+		return -EINVAL;
+	}
+
+	if (ctx->state == UNCOMMITTED) {
+		ret = go2001_init_codec(ctx);
+		if (ret) {
+			go2001_err(ctx->gdev, "Failed initializing codec\n");
+			return ret;
+		}
+
+		go2001_set_ctx_state(ctx, COMMITTED);
+	}
+
+	return vb2_reqbufs(vq, rb);
+}
+
+static int go2001_move_from_resume_queue(struct go2001_ctx *ctx)
+{
+	struct list_head temp_list;
+	struct go2001_buffer *gbuf;
+	unsigned long flags;
+	int ret = 0;
+
+	/*
+	 * The buffer which triggered the resolution change, and any buffers
+	 * which might have followed it and were sent by us to the hardware
+	 * before we got the resolution change notification, have to be
+	 * processed again, in the same order.
+	 * Move them from the resume queue to the front of the source
+	 * queue, and reinitialize for processing.
+	 *
+	 * First, make a copy of the resume list, so we can release
+	 * the lock to be able to call go2001_prepare_gbuf() on each element.
+	 */
+	INIT_LIST_HEAD(&temp_list);
+	spin_lock_irqsave(&ctx->qlock, flags);
+	list_splice_init(&ctx->src_resume_q, &temp_list);
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+	list_for_each_entry(gbuf, &temp_list, list) {
+		go2001_dbg(ctx->gdev, 3, "Requeuing buffer %p\n", gbuf);
+
+		ret = go2001_prepare_gbuf(ctx, gbuf, true);
+		if (ret)
+			break;
+	}
+
+	/*
+	 * Finally, splice the lists so that the resume list is added in
+	 * front of the source list.
+	 */
+	spin_lock_irqsave(&ctx->qlock, flags);
+	list_splice_init(&temp_list, &ctx->src_buf_q);
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	return ret;
+}
+
+static int go2001_reqbufs_cap(struct go2001_ctx *ctx,
+			      struct v4l2_requestbuffers *rb)
+{
+	struct vb2_queue *vq = &ctx->dst_vq;
+	int ret = 0;
+
+	go2001_dbg(ctx->gdev, 3, "count: %d\n", rb->count);
+
+	if (rb->count == 0)
+		return vb2_reqbufs(vq, rb);
+
+	if (!go2001_has_frame_info(ctx)) {
+		go2001_err(ctx->gdev, "No frame info available yet\n");
+		return -EINVAL;
+	}
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER) {
+		switch (ctx->state) {
+		case RES_CHANGE:
+		case PAUSED:
+			ret = go2001_move_from_resume_queue(ctx);
+			if (ret)
+				go2001_set_ctx_state(ctx, ERROR);
+			else
+				go2001_set_ctx_state(ctx, PAUSED);
+			break;
+
+		default:
+			go2001_err(ctx->gdev, "Invalid state\n");
+			return -EINVAL;
+		}
+	} else {
+		if (ctx->state == UNCOMMITTED) {
+			ret = go2001_init_codec(ctx);
+			if (ret) {
+				go2001_err(ctx->gdev, "Failed initializing codec\n");
+				return ret;
+			}
+
+			go2001_set_ctx_state(ctx, COMMITTED);
+		}
+	}
+
+	return vb2_reqbufs(vq, rb);
+}
+
+static int go2001_reqbufs(struct file *file, void *fh,
+			  struct v4l2_requestbuffers *rb)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	int ret;
+
+	if (V4L2_TYPE_IS_OUTPUT(rb->type))
+		ret = go2001_reqbufs_out(ctx, rb);
+	else
+		ret = go2001_reqbufs_cap(ctx, rb);
+
+	if (ret)
+		go2001_err(ctx->gdev, "REQBUFS for type %d failed\n", rb->type);
+	else
+		go2001_dbg(ctx->gdev, 2, "Allocated %d buffers for type %d\n",
+			   rb->count, rb->type);
+
+	return ret;
+}
+
+static int go2001_querybuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	int ret;
+	int i;
+
+	go2001_trace(ctx->gdev);
+
+	if (V4L2_TYPE_IS_OUTPUT(b->type))
+		return vb2_querybuf(&ctx->src_vq, b);
+
+	/* Capture buffer */
+	ret = vb2_querybuf(&ctx->dst_vq, b);
+
+	if (V4L2_TYPE_IS_MULTIPLANAR(b->type))
+		for (i = 0; i < b->length; ++i)
+			b->m.planes[i].m.mem_offset += DST_QUEUE_OFF_BASE;
+	else
+		b->m.offset += DST_QUEUE_OFF_BASE;
+
+	return ret;
+}
+
+static int go2001_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *vq = go2001_get_vq(ctx, b->type);
+
+	if (ctx->state == ERROR) {
+		go2001_dbg(ctx->gdev, 1, "Context %p in error state\n", ctx);
+		return -EIO;
+	}
+
+	return vb2_qbuf(vq, b);
+}
+
+static int go2001_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *vq = go2001_get_vq(ctx, b->type);
+
+	return vb2_dqbuf(vq, b, file->f_flags & O_NONBLOCK);
+}
+
+static int go2001_expbuf(struct file *file, void *fh,
+			 struct v4l2_exportbuffer *e)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *vq = go2001_get_vq(ctx, e->type);
+
+	return vb2_expbuf(vq, e);
+}
+
+static int go2001_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *vq = go2001_get_vq(ctx, type);
+
+	go2001_trace(ctx->gdev);
+
+	return vb2_streamon(vq, type);
+}
+
+static int go2001_streamoff(struct file *file, void *fh,
+			    enum v4l2_buf_type type)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct vb2_queue *vq = go2001_get_vq(ctx, type);
+
+	go2001_trace(ctx->gdev);
+
+	return vb2_streamoff(vq, type);
+}
+
+static int go2001_subscribe_event(struct v4l2_fh *fh,
+				  const struct v4l2_event_subscription *sub)
+{
+	switch (sub->type) {
+	case V4L2_EVENT_EOS:
+		return v4l2_event_subscribe(fh, sub, 2, NULL);
+
+	case V4L2_EVENT_SOURCE_CHANGE:
+		return v4l2_event_subscribe(fh, sub, 2, NULL);
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static int go2001_enum_framesizes(struct file *file, void *fh,
+				  struct v4l2_frmsizeenum *fsize)
+{
+	struct go2001_ctx *ctx = fh_to_ctx(file->private_data);
+	struct v4l2_frmsize_stepwise *s = &fsize->stepwise;
+	struct go2001_fmt *fmt;
+
+	if (fsize->index != 0)
+		return -EINVAL;
+
+	fmt = go2001_find_fmt(ctx, fsize->pixel_format);
+	if (!fmt) {
+		go2001_dbg(ctx->gdev, 1, "Unsupported pixelformat %d\n",
+			   fsize->pixel_format);
+		return -EINVAL;
+	}
+
+	if (fmt->type != FMT_TYPE_CODED) {
+		go2001_dbg(ctx->gdev, 1, "Only supported for coded formats\n");
+		return -EINVAL;
+	}
+
+	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+	s->min_width = GO2001_VPX_MACROBLOCK_SIZE;
+	s->max_width = 1920;
+	s->step_width = 2;
+	s->min_height = GO2001_VPX_MACROBLOCK_SIZE;
+	s->max_height = 1088;
+	s->step_height = 2;
+
+	return 0;
+}
+
+static const struct v4l2_ioctl_ops go2001_ioctl_dec_ops = {
+	.vidioc_querycap = go2001_querycap,
+
+	.vidioc_enum_fmt_vid_cap_mplane = go2001_enum_fmt_cap,
+	.vidioc_enum_fmt_vid_out_mplane = go2001_enum_fmt_out,
+
+	.vidioc_g_fmt_vid_cap_mplane = go2001_dec_g_fmt_cap,
+	.vidioc_g_fmt_vid_out_mplane = go2001_dec_g_fmt_out,
+
+	.vidioc_s_fmt_vid_cap_mplane = go2001_dec_s_fmt_cap,
+	.vidioc_s_fmt_vid_out_mplane = go2001_dec_s_fmt_out,
+
+	.vidioc_try_fmt_vid_cap_mplane = go2001_dec_try_fmt_cap,
+	.vidioc_try_fmt_vid_out_mplane = go2001_dec_try_fmt_out,
+
+	.vidioc_g_crop = go2001_dec_g_crop,
+
+	.vidioc_reqbufs = go2001_reqbufs,
+	.vidioc_querybuf = go2001_querybuf,
+	.vidioc_qbuf = go2001_qbuf,
+	.vidioc_dqbuf = go2001_dqbuf,
+	.vidioc_streamon = go2001_streamon,
+	.vidioc_streamoff = go2001_streamoff,
+	.vidioc_expbuf = go2001_expbuf,
+
+	.vidioc_enum_framesizes = go2001_enum_framesizes,
+
+	.vidioc_subscribe_event = go2001_subscribe_event,
+};
+
+static const struct v4l2_ioctl_ops go2001_ioctl_enc_ops = {
+	.vidioc_querycap = go2001_querycap,
+
+	.vidioc_enum_fmt_vid_cap_mplane = go2001_enum_fmt_cap,
+	.vidioc_enum_fmt_vid_out_mplane = go2001_enum_fmt_out,
+
+	.vidioc_g_fmt_vid_cap_mplane = go2001_enc_g_fmt_cap,
+	.vidioc_g_fmt_vid_out_mplane = go2001_enc_g_fmt_out,
+
+	.vidioc_s_fmt_vid_cap_mplane = go2001_enc_s_fmt_cap,
+	.vidioc_s_fmt_vid_out_mplane = go2001_enc_s_fmt_out,
+
+	.vidioc_try_fmt_vid_cap_mplane = go2001_enc_try_fmt_cap,
+	.vidioc_try_fmt_vid_out_mplane = go2001_enc_try_fmt_out,
+
+	.vidioc_g_crop = go2001_enc_g_crop,
+	.vidioc_s_crop = go2001_enc_s_crop,
+
+	.vidioc_s_parm = go2001_enc_s_parm,
+	.vidioc_g_parm = go2001_enc_g_parm,
+
+	.vidioc_reqbufs = go2001_reqbufs,
+	.vidioc_querybuf = go2001_querybuf,
+	.vidioc_qbuf = go2001_qbuf,
+	.vidioc_dqbuf = go2001_dqbuf,
+	.vidioc_streamon = go2001_streamon,
+	.vidioc_streamoff = go2001_streamoff,
+	.vidioc_expbuf = go2001_expbuf,
+
+	.vidioc_enum_framesizes = go2001_enum_framesizes,
+};
+
+static int go2001_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	int ret;
+	struct go2001_dev *gdev;
+	struct video_device *vdev;
+
+	dev_info(&pdev->dev, "Probing GO2001\n");
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		go2001_err_nodev("Failed enabling device\n");
+		return ret;
+	}
+
+	ret = pci_request_regions(pdev, DRIVER_NAME);
+	if (ret) {
+		go2001_err_nodev("Failed requesting regions\n");
+		goto disable_device;
+	}
+
+	pci_set_master(pdev);
+
+	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+	if (!ret)
+		ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+
+	if (ret) {
+		go2001_err_nodev("No suitable DMA available\n");
+		goto release_regions;
+	}
+
+	gdev = devm_kzalloc(&pdev->dev, sizeof(*gdev), GFP_KERNEL);
+	if (!gdev) {
+		ret = -ENOMEM;
+		goto release_regions;
+	}
+
+	gdev->pdev = pdev;
+	mutex_init(&gdev->lock);
+
+	spin_lock_init(&gdev->irqlock);
+	INIT_LIST_HEAD(&gdev->inst_list);
+	INIT_LIST_HEAD(&gdev->new_inst_list);
+	INIT_LIST_HEAD(&gdev->ctx_list);
+	init_waitqueue_head(&gdev->reply_wq);
+	init_completion(&gdev->fw_completion);
+	INIT_DELAYED_WORK(&gdev->watchdog_work, go2001_watchdog);
+
+	gdev->msg_cache = kmem_cache_create("msg_cache",
+					    sizeof(struct go2001_msg), 0,
+					    SLAB_HWCACHE_ALIGN, NULL);
+	if (!gdev->msg_cache) {
+		go2001_err(gdev, "Failed creating msg cache\n");
+		goto release_regions;
+	}
+
+	ret = go2001_map_iomem(gdev);
+	if (ret) {
+		go2001_err(gdev, "Failed mapping IO memory\n");
+		goto release_cache;
+	}
+
+	ret = pci_enable_msi(pdev);
+	if (ret) {
+		go2001_err(gdev, "Failed enabling MSI\n");
+		goto unmap;
+	}
+
+	ret = request_irq(pdev->irq, go2001_irq, 0, DRIVER_NAME, gdev);
+	if (ret) {
+		go2001_err(gdev, "Failed requesting IRQ\n");
+		goto disable_msi;
+	}
+
+	ret = v4l2_device_register(&pdev->dev, &gdev->v4l2_dev);
+	if (ret) {
+		go2001_err(gdev, "Failed registering V4L2 device\n");
+		goto free_irq;
+	}
+
+	vdev = &gdev->dec_vdev;
+	strlcpy(vdev->name, VDEV_NAME_DEC, sizeof(vdev->name));
+	vdev->v4l2_dev = &gdev->v4l2_dev;
+	vdev->vfl_dir = VFL_DIR_M2M;
+	vdev->fops = &go2001_fops;
+	vdev->ioctl_ops = &go2001_ioctl_dec_ops;
+	vdev->lock = &gdev->lock;
+	vdev->release = video_device_release_empty;
+
+	video_set_drvdata(vdev, gdev);
+
+	ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+	if (ret)
+		goto unregister_v4l2_device;
+
+	vdev = &gdev->enc_vdev;
+	strlcpy(vdev->name, VDEV_NAME_ENC, sizeof(vdev->name));
+	vdev->v4l2_dev = &gdev->v4l2_dev;
+	vdev->vfl_dir = VFL_DIR_M2M;
+	vdev->fops = &go2001_fops;
+	vdev->ioctl_ops = &go2001_ioctl_enc_ops;
+	vdev->lock = &gdev->lock;
+	vdev->release = video_device_release_empty;
+
+	video_set_drvdata(vdev, gdev);
+
+	ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+	if (ret)
+		goto unregister_video_device_dec;
+
+	dev_info(&pdev->dev, "GO2001 successfully initialized.\n");
+
+	return 0;
+
+unregister_video_device_dec:
+	video_unregister_device(&gdev->dec_vdev);
+unregister_v4l2_device:
+	v4l2_device_unregister(&gdev->v4l2_dev);
+free_irq:
+	free_irq(pdev->irq, gdev);
+disable_msi:
+	pci_disable_msi(pdev);
+unmap:
+	go2001_unmap_iomem(gdev);
+release_cache:
+	kmem_cache_destroy(gdev->msg_cache);
+release_regions:
+	pci_release_regions(pdev);
+disable_device:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void go2001_remove(struct pci_dev *pdev)
+{
+	struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
+	struct go2001_dev *gdev = container_of(v4l2_dev, struct go2001_dev,
+					       v4l2_dev);
+
+	dev_info(&pdev->dev, "Removing GO2001\n");
+
+	video_unregister_device(&gdev->enc_vdev);
+	video_unregister_device(&gdev->dec_vdev);
+
+	v4l2_device_unregister(&gdev->v4l2_dev);
+
+	free_irq(pdev->irq, gdev);
+
+	pci_disable_msi(pdev);
+
+	go2001_unmap_iomem(gdev);
+
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int go2001_suspend(struct device *dev)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
+	unsigned long flags1, flags2;
+	struct go2001_ctx *ctx;
+	struct go2001_dev *gdev = container_of(v4l2_dev, struct go2001_dev,
+					       v4l2_dev);
+
+	go2001_trace(gdev);
+
+	spin_lock_irqsave(&gdev->irqlock, flags1);
+
+	list_for_each_entry(ctx, &gdev->ctx_list, ctx_entry) {
+		spin_lock_irqsave(&ctx->qlock, flags2);
+		go2001_set_ctx_state(ctx, ERROR);
+		spin_unlock_irqrestore(&ctx->qlock, flags2);
+	}
+
+	spin_unlock_irqrestore(&gdev->irqlock, flags1);
+
+	ret = wait_event_timeout(gdev->reply_wq, gdev->msgs_in_flight == 0,
+				 msecs_to_jiffies(GO2001_WATCHDOG_TIMEOUT_MS));
+	if (ret == 0)
+		go2001_err(gdev, "Timed out waiting for HW to become idle\n");
+
+	mutex_lock(&gdev->lock);
+	go2001_cancel_all_contexts(gdev);
+	mutex_unlock(&gdev->lock);
+
+	return 0;
+}
+
+static int go2001_resume(struct device *dev)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
+	struct go2001_dev *gdev = container_of(v4l2_dev, struct go2001_dev,
+					       v4l2_dev);
+
+	go2001_trace(gdev);
+
+	mutex_lock(&gdev->lock);
+
+	ret = go2001_init(gdev);
+	if (ret) {
+		gdev->initialized = false;
+		go2001_err(gdev, "Failed resetting firmware\n");
+	}
+
+	mutex_unlock(&gdev->lock);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(go2001_pm_ops, go2001_suspend, go2001_resume);
+
+static const struct pci_device_id go2001_pci_tbl[] = {
+	{ PCI_DEVICE(0x1ae0, 0x001a) },
+	{},
+};
+
+static struct pci_driver go2001_driver = {
+	.name = KBUILD_MODNAME,
+	.probe = go2001_probe,
+	.remove = go2001_remove,
+	.id_table = go2001_pci_tbl,
+	.driver.pm = &go2001_pm_ops,
+};
+
+module_pci_driver(go2001_driver);
+
+MODULE_DESCRIPTION("GO2001 PCI-E codec driver");
+MODULE_AUTHOR("Pawel Osciak <posciak@xxxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, go2001_pci_tbl);
diff --git a/drivers/media/pci/go2001/go2001_hw.c b/drivers/media/pci/go2001/go2001_hw.c
new file mode 100644
index 0000000..1a79635
--- /dev/null
+++ b/drivers/media/pci/go2001/go2001_hw.c
@@ -0,0 +1,1365 @@
+/*
+ *  go2001 - GO2001 codec driver.
+ *
+ *  Author : Pawel Osciak <posciak@xxxxxxxxxxxx>
+ *
+ *  Copyright (C) 2017 Google, Inc.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/delay.h>
+#include <linux/firmware.h>
+
+#include "go2001.h"
+#include "go2001_hw.h"
+#include "go2001_proto.h"
+
+static int go2001_load_fw_image(struct go2001_dev *gdev,
+				const struct firmware *fw,
+				void __iomem *ctrl_addr, size_t ctrl_size,
+				void __iomem *load_addr, size_t max_size,
+				u32 entry_addr)
+{
+	struct go2001_boot_hdr hdr;
+	u8 *chksum_ptr;
+	size_t chksum_size;
+	unsigned long flags;
+	u32 reg;
+	int i;
+
+	if (fw->size > GO2001_FW_MAX_SIZE || fw->size > max_size) {
+		go2001_err(gdev, "Firmware image too large (%zu)\n", fw->size);
+		return -EINVAL;
+	}
+
+	if (ctrl_size < GO2001_FW_HDR_OFF + sizeof(hdr) ||
+	    ctrl_size < GO2001_FW_STOP + sizeof(u32)) {
+		go2001_err(gdev, "PCI BAR sizes invalid\n");
+		return -ENODEV;
+	}
+
+	hdr.signature = GO2001_FW_SIGNATURE;
+	hdr.entry_addr = entry_addr;
+	hdr.size = 16;
+	hdr.checksum = 0;
+
+	/*
+	 * Calculate a checksum of the header (excluding checksum field itself).
+	 */
+	chksum_ptr = (u8 *)&hdr;
+	chksum_size = offsetof(struct go2001_boot_hdr, checksum);
+	for (i = 0; i < chksum_size; ++i)
+		hdr.checksum += chksum_ptr[i];
+	hdr.checksum &= 0xff;
+
+	/* Stop the firmware via a soft interrupt. */
+	writeb('p', ctrl_addr + GO2001_FW_HDR_OFF);
+	reg = readl(ctrl_addr + GO2001_FW_STOP);
+	reg |= GO2001_FW_STOP_BIT;
+	writel(reg, ctrl_addr + GO2001_FW_STOP);
+
+	/*
+	 * The next interrupt after resuming will be the "firmware loaded"
+	 * interrupt, clear the flag so we handle this on next IRQ.
+	 */
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	gdev->fw_loaded = false;
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	/* Copy firmware and the header */
+	memcpy_toio(load_addr, fw->data, fw->size);
+	writel(hdr.entry_addr, ctrl_addr + GO2001_FW_HDR_OFF +
+			       offsetof(struct go2001_boot_hdr, entry_addr));
+	writel(hdr.size, ctrl_addr + GO2001_FW_HDR_OFF +
+			 offsetof(struct go2001_boot_hdr, size));
+	writel(hdr.checksum, ctrl_addr + GO2001_FW_HDR_OFF +
+			     offsetof(struct go2001_boot_hdr, checksum));
+	/*
+	 * Write signature last, as this is what the device is spinning on
+	 * while we are loading the firmware
+	 */
+	writel(hdr.signature, ctrl_addr + GO2001_FW_HDR_OFF +
+			      offsetof(struct go2001_boot_hdr, signature));
+
+	/* Clear the interrupt. */
+	reg &= ~GO2001_FW_STOP_BIT;
+	writel(reg, ctrl_addr + GO2001_FW_STOP);
+
+	return 0;
+}
+
+static int go2001_load_firmware(struct go2001_dev *gdev)
+{
+	resource_size_t ctrl_start, fw_start;
+	const struct firmware *boot_fw = NULL;
+	const struct firmware *fw = NULL;
+	void __iomem *fw_iomem;
+	void __iomem *ctrl_iomem;
+	size_t fw_iomem_size, ctrl_iomem_size;
+	int time_spent = 0;
+	int ret;
+
+	init_completion(&gdev->fw_completion);
+
+	ctrl_start = pci_resource_start(gdev->pdev, 2);
+	ctrl_iomem_size = pci_resource_len(gdev->pdev, 2);
+	if (!ctrl_start || !ctrl_iomem_size) {
+		go2001_err(gdev, "PCI BAR 2 invalid\n");
+		return -ENODEV;
+	}
+
+	fw_start = pci_resource_start(gdev->pdev, 0);
+	fw_iomem_size = pci_resource_len(gdev->pdev, 0);
+	if (!fw_start || !fw_iomem_size) {
+		go2001_err(gdev, "PCI BAR 0 invalid\n");
+		return -ENODEV;
+	}
+
+	if (ctrl_iomem_size < GO2001_BOOT_FW_OFF ||
+	    fw_iomem_size < GO2001_FW_OFF) {
+		go2001_err(gdev, "Invalid PCI BAR sizes\n");
+		return -EINVAL;
+	}
+
+	ctrl_iomem = ioremap_nocache(ctrl_start, ctrl_iomem_size);
+	if (!ctrl_iomem) {
+		go2001_err(gdev, "Failed mapping PCI BAR 2\n");
+		return -ENOMEM;
+	}
+
+	fw_iomem = ioremap_nocache(fw_start, fw_iomem_size);
+	if (!fw_iomem) {
+		go2001_err(gdev, "Failed mapping PCI BAR 0\n");
+		ret = -ENOMEM;
+		goto out_unmap_ctrl_iomem;
+	}
+
+	ret = request_firmware(&boot_fw, GO2001_BOOT_FW_NAME, &gdev->pdev->dev);
+	if (ret) {
+		go2001_err(gdev, "Unable to open firmware %s\n",
+			   GO2001_BOOT_FW_NAME);
+		goto out_unmap_fw_iomem;
+	}
+
+	ret = request_firmware(&fw, GO2001_FW_NAME, &gdev->pdev->dev);
+	if (ret) {
+		go2001_err(gdev, "Unable to open firmware %s\n",
+			   GO2001_FW_NAME);
+		goto out_release_boot_fw;
+	}
+
+	ret = go2001_load_fw_image(gdev, boot_fw,
+				ctrl_iomem, ctrl_iomem_size,
+				ctrl_iomem + GO2001_BOOT_FW_OFF,
+				ctrl_iomem_size - GO2001_BOOT_FW_OFF,
+				GO2001_BOOT_FW_ENTRY_BASE + GO2001_BOOT_FW_OFF);
+	if (ret) {
+		go2001_err(gdev, "Failed loading firmware %s\n",
+			   GO2001_BOOT_FW_NAME);
+		goto out_release_fw;
+	}
+
+	/*
+	 * Boot firmware will change GO2001_FW_SIGNATURE to
+	 * GO2001_FW_DONE_SIGNATURE when done.
+	 */
+	while (readl(ctrl_iomem + GO2001_FW_HDR_OFF) !=
+						GO2001_FW_DONE_SIGNATURE &&
+	       time_spent < GO2001_REPLY_TIMEOUT_MS) {
+		mdelay(100);
+		time_spent += 100;
+	}
+
+	if (time_spent >= GO2001_REPLY_TIMEOUT_MS) {
+		go2001_err(gdev, "Timed out waiting for firmware to start\n");
+		ret = -ENODEV;
+		goto out_release_fw;
+	}
+
+	go2001_dbg(gdev, 1, "Firmware %s loaded\n", GO2001_BOOT_FW_NAME);
+
+	ret = go2001_load_fw_image(gdev, fw, ctrl_iomem, ctrl_iomem_size,
+				   fw_iomem + GO2001_FW_OFF,
+				   fw_iomem_size - GO2001_FW_OFF,
+				   GO2001_FW_ENTRY_BASE + GO2001_FW_OFF);
+	if (ret) {
+		go2001_err(gdev, "Failed loading firmware %s\n",
+			   GO2001_FW_NAME);
+		goto out_release_fw;
+	}
+
+	if (wait_for_completion_timeout(&gdev->fw_completion,
+			msecs_to_jiffies(GO2001_REPLY_TIMEOUT_MS)) == 0) {
+		go2001_err(gdev, "Timed out waiting for firmware\n");
+		ret = -ENODEV;
+		goto out_release_fw;
+	}
+
+	go2001_dbg(gdev, 1, "Firmware %s loaded\n", GO2001_FW_NAME);
+
+out_release_fw:
+	release_firmware(fw);
+out_release_boot_fw:
+	release_firmware(boot_fw);
+out_unmap_fw_iomem:
+	iounmap(fw_iomem);
+out_unmap_ctrl_iomem:
+	iounmap(ctrl_iomem);
+
+	return ret;
+}
+
+int go2001_map_iomem(struct go2001_dev *gdev)
+{
+	resource_size_t start = pci_resource_start(gdev->pdev, 0);
+	resource_size_t len = pci_resource_len(gdev->pdev, 0);
+
+	if (!start || !len)
+		return -ENODEV;
+
+	if (len < GO2001_MSG_RING_MEM_OFFSET + GO2001_MSG_RING_MEM_SIZE)
+		return -ENODEV;
+
+	gdev->iomem_size = GO2001_MSG_RING_MEM_SIZE;
+	gdev->iomem = ioremap(start + GO2001_MSG_RING_MEM_OFFSET,
+			      gdev->iomem_size);
+	if (!gdev->iomem)
+		return -ENOMEM;
+
+	return 0;
+}
+
+void go2001_unmap_iomem(struct go2001_dev *gdev)
+{
+	iounmap(gdev->iomem);
+}
+
+void go2001_init_hw_inst(struct go2001_hw_inst *inst, u32 inst_id)
+{
+	inst->session_id = inst_id;
+	inst->sequence_id = 0;
+	inst->last_reply_seq_id = 0;
+	INIT_LIST_HEAD(&inst->pending_list);
+	INIT_LIST_HEAD(&inst->inst_entry);
+}
+
+static void go2001_release_hw_inst(struct go2001_dev *gdev,
+				   struct go2001_hw_inst *inst)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	go2001_cancel_hw_inst_locked(gdev, inst);
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+}
+
+static int go2001_init_ring(struct go2001_dev *gdev,
+			    struct go2001_msg_ring *ring,
+			    off_t ring_desc_offset)
+{
+	struct go2001_msg_ring_desc *desc = &ring->desc;
+
+	spin_lock_init(&ring->lock);
+
+	ring->desc_iomem = gdev->iomem + ring_desc_offset;
+	memcpy_fromio(desc, ring->desc_iomem, sizeof(*desc));
+	go2001_dbg(gdev, 1, "Ring %p: [0x%x-0x%x], msg size: %d, capacity: %d, wr_off: 0x%x, rd_off: 0x%x\n",
+		   ring->desc_iomem, desc->start_off, desc->end_off,
+		   desc->msg_size,
+		   (desc->end_off - desc->start_off) / desc->msg_size,
+		   desc->wr_off, desc->rd_off);
+
+	if (WARN_ON(desc->msg_size == 0 || desc->end_off <= desc->start_off ||
+		    desc->end_off > gdev->iomem_size ||
+		    desc->wr_off != desc->rd_off)) {
+		go2001_err(gdev, "Invalid ring descriptor\n");
+		return -EIO;
+	}
+
+	if (WARN_ON(desc->msg_size > sizeof(struct go2001_msg))) {
+		go2001_err(gdev, "Ring message size over limit\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int go2001_init_messaging(struct go2001_dev *gdev)
+{
+	int ret = 0;
+
+	go2001_dbg(gdev, 1, "Initializing TX ring\n");
+
+	ret = go2001_init_ring(gdev, &gdev->tx_ring,
+			       GO2001_TX_RING_DESC_OFFSET);
+	if (ret)
+		return ret;
+
+	go2001_dbg(gdev, 1, "Initializing RX ring\n");
+
+	ret = go2001_init_ring(gdev, &gdev->rx_ring,
+			       GO2001_RX_RING_DESC_OFFSET);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static void go2001_update_ring_locked(struct go2001_msg_ring *r)
+{
+	r->desc.wr_off = ioread32(r->desc_iomem +
+				offsetof(struct go2001_msg_ring_desc, wr_off));
+	r->desc.rd_off = ioread32(r->desc_iomem +
+				offsetof(struct go2001_msg_ring_desc, rd_off));
+}
+
+static inline bool go2001_ring_is_full_locked(struct go2001_msg_ring *r)
+{
+	u32 next_off;
+
+	go2001_update_ring_locked(r);
+	next_off = r->desc.wr_off + r->desc.msg_size;
+	return (next_off == r->desc.rd_off ||
+		(r->desc.rd_off == r->desc.start_off &&
+		 next_off >= r->desc.end_off));
+}
+
+static inline bool go2001_ring_is_empty_locked(struct go2001_msg_ring *r)
+{
+	go2001_update_ring_locked(r);
+	return r->desc.rd_off == r->desc.wr_off;
+}
+
+static struct go2001_msg *prepare_msg(struct go2001_dev *gdev,
+				      enum go2001_msg_type type,
+				      size_t param_size)
+{
+	struct go2001_msg *msg;
+	struct go2001_msg_hdr *hdr;
+
+	msg = kmem_cache_zalloc(gdev->msg_cache, GFP_KERNEL);
+	if (!msg) {
+		go2001_err(gdev, "Failed allocating msg\n");
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&msg->list_entry);
+	hdr = msg_to_hdr(msg);
+	hdr->type = type;
+	hdr->size = go2001_calc_payload_size(param_size);
+
+	return msg;
+}
+
+static void free_msg(struct go2001_dev *gdev, struct go2001_msg *msg)
+{
+	WARN_ON(!list_empty(&msg->list_entry));
+	kmem_cache_free(gdev->msg_cache, msg);
+}
+
+static struct go2001_hw_inst *get_next_ready_hw_inst(struct go2001_dev *gdev)
+{
+	struct go2001_hw_inst *hw_inst;
+
+	go2001_trace(gdev);
+
+	if (list_empty(&gdev->inst_list))
+		return NULL;
+
+	if (!gdev->curr_hw_inst) {
+		gdev->curr_hw_inst = list_first_entry(&gdev->inst_list,
+					struct go2001_hw_inst, inst_entry);
+	}
+
+	hw_inst = gdev->curr_hw_inst;
+	list_for_each_entry_continue(hw_inst, &gdev->inst_list, inst_entry) {
+		if (!list_empty(&hw_inst->pending_list))
+			return hw_inst;
+	}
+
+	list_for_each_entry(hw_inst, &gdev->inst_list, inst_entry) {
+		if (!list_empty(&hw_inst->pending_list))
+			return hw_inst;
+
+		if (hw_inst == gdev->curr_hw_inst)
+			break;
+	}
+
+	return NULL;
+}
+
+static struct go2001_msg *go2001_get_pending_msg_locked(struct go2001_dev *gdev)
+{
+	struct go2001_hw_inst *hw_inst;
+	struct go2001_msg_hdr *hdr;
+	struct go2001_msg *msg;
+
+	assert_spin_locked(&gdev->irqlock);
+
+	hw_inst = get_next_ready_hw_inst(gdev);
+	if (!hw_inst) {
+		go2001_dbg(gdev, 5, "No pending messages\n");
+		return NULL;
+	}
+
+	gdev->curr_hw_inst = hw_inst;
+	msg = list_first_entry(&hw_inst->pending_list, struct go2001_msg,
+			       list_entry);
+	hdr = msg_to_hdr(msg);
+	go2001_dbg(gdev, 5, "Found pending message for instance %d, seqid %d\n",
+		   hw_inst->session_id, hdr->sequence_id);
+
+	list_del_init(&msg->list_entry);
+
+	return msg;
+}
+
+static void go2001_drop_pending_for_hw_inst_locked(struct go2001_dev *gdev,
+						struct go2001_hw_inst *hw_inst)
+{
+	struct go2001_msg *msg, *tmp_msg;
+
+	assert_spin_locked(&gdev->irqlock);
+
+	list_for_each_entry_safe(msg, tmp_msg, &hw_inst->pending_list,
+				 list_entry) {
+		list_del_init(&msg->list_entry);
+		free_msg(gdev, msg);
+	}
+
+	INIT_LIST_HEAD(&hw_inst->pending_list);
+}
+
+void go2001_cancel_hw_inst_locked(struct go2001_dev *gdev,
+				  struct go2001_hw_inst *hw_inst)
+{
+	assert_spin_locked(&gdev->irqlock);
+
+	WARN_ON(!list_empty(&hw_inst->inst_entry) &&
+		!list_empty(&hw_inst->pending_list));
+
+	go2001_drop_pending_for_hw_inst_locked(gdev, hw_inst);
+	list_del_init(&hw_inst->inst_entry);
+	if (gdev->curr_hw_inst == hw_inst)
+		gdev->curr_hw_inst = NULL;
+}
+
+void go2001_cancel_all_hw_inst_locked(struct go2001_dev *gdev)
+{
+	struct go2001_hw_inst *hw_inst;
+
+	assert_spin_locked(&gdev->irqlock);
+
+	list_for_each_entry(hw_inst, &gdev->inst_list, inst_entry)
+		go2001_drop_pending_for_hw_inst_locked(gdev, hw_inst);
+	INIT_LIST_HEAD(&gdev->inst_list);
+
+	list_for_each_entry(hw_inst, &gdev->new_inst_list, inst_entry)
+		go2001_drop_pending_for_hw_inst_locked(gdev, hw_inst);
+	INIT_LIST_HEAD(&gdev->new_inst_list);
+
+	gdev->curr_hw_inst = NULL;
+}
+
+static void go2001_print_msg(struct go2001_dev *gdev, struct go2001_msg *msg,
+			     const char *prefix)
+{
+	struct go2001_msg_hdr *hdr = msg_to_hdr(msg);
+
+	go2001_dbg(gdev, 4, "%s: MSG: [%d/%d], type=0x%x, size=%d, status=0x%x\n",
+		   prefix, hdr->session_id, hdr->sequence_id, hdr->type,
+		   hdr->size, hdr->status);
+
+	if (go2001_debug_level >= 5)
+		print_hex_dump(KERN_DEBUG, prefix, DUMP_PREFIX_NONE, 16, 1,
+			       msg_to_param(msg),
+			       hdr->size - sizeof(struct go2001_msg_hdr),
+			       false);
+}
+
+static void go2001_print_mmap_list(struct go2001_dev *gdev,
+				   struct go2001_dma_desc *dma_desc)
+{
+	struct go2001_mmap_list_entry *mmap_list = dma_desc->mmap_list;
+	int i;
+
+	for (i = 0; i < dma_desc->num_entries; ++i)
+		go2001_dbg(gdev, 4, "entry %02d: addr: 0x%08llx, size: %d\n",
+			   i, mmap_list[i].dma_addr, mmap_list[i].size);
+}
+
+static void go2001_send_pending_locked(struct go2001_dev *gdev)
+{
+	struct go2001_msg_ring *r = &gdev->tx_ring;
+	struct go2001_msg *msg;
+	struct go2001_msg_hdr *hdr;
+	unsigned long flags;
+	struct go2001_msg_ring_desc *desc = &r->desc;
+
+	spin_lock_irqsave(&r->lock, flags);
+
+	while (1) {
+		if (go2001_ring_is_full_locked(r)) {
+			go2001_dbg(gdev, 5, "TX ring full, not sending.\n");
+			break;
+		}
+
+		msg = go2001_get_pending_msg_locked(gdev);
+		if (!msg)
+			break;
+
+		hdr = msg_to_hdr(msg);
+
+		memcpy_toio(r->desc_iomem + desc->wr_off, hdr, hdr->size);
+		go2001_print_msg(gdev, msg, "TX: ");
+		desc->wr_off += desc->msg_size;
+		if (desc->wr_off >= desc->end_off)
+			desc->wr_off = desc->start_off;
+
+		iowrite32(desc->wr_off, r->desc_iomem
+			  + offsetof(struct go2001_msg_ring_desc, wr_off));
+
+		if (gdev->msgs_in_flight == 0)
+			schedule_delayed_work(&gdev->watchdog_work,
+				msecs_to_jiffies(GO2001_WATCHDOG_TIMEOUT_MS));
+
+		++gdev->msgs_in_flight;
+
+		go2001_dbg(gdev, 5, "Messages in flight: %d\n",
+			   gdev->msgs_in_flight);
+
+		free_msg(gdev, msg);
+	}
+
+	spin_unlock_irqrestore(&r->lock, flags);
+}
+
+void go2001_send_pending(struct go2001_dev *gdev)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	go2001_send_pending_locked(gdev);
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+}
+
+/*
+ * NOTE: msg must not be used by the caller after this functions returns;
+ * either we'll free it after sending it to HW, or it will be cleaned up by the
+ * watchdog on timeout (if still on the pending_list at that time).
+ */
+static u32 go2001_queue_msg_locked(struct go2001_dev *gdev,
+				   struct go2001_hw_inst *hw_inst,
+				   struct go2001_msg *msg)
+{
+	struct go2001_msg_hdr *hdr = msg_to_hdr(msg);
+	u32 seqid;
+
+	assert_spin_locked(&gdev->irqlock);
+
+	hdr->session_id = hw_inst->session_id;
+	seqid = ++hw_inst->sequence_id;
+	hdr->sequence_id = seqid;
+	list_add_tail(&msg->list_entry, &hw_inst->pending_list);
+
+	return seqid;
+}
+
+static u32 go2001_queue_msg(struct go2001_ctx *ctx, struct go2001_msg *msg)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	unsigned long flags;
+	u32 type = msg_to_hdr(msg)->type;
+	u32 seqid;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	seqid = go2001_queue_msg_locked(gdev, &ctx->hw_inst, msg);
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+	go2001_dbg(gdev, 5, "Queued message type 0x%x for inst %d, seqid: %d\n",
+		   type, ctx->hw_inst.session_id, seqid);
+
+	/* The message is freed after being sent to hardware or on error. */
+	go2001_send_pending(gdev);
+
+	return seqid;
+}
+
+static struct go2001_hw_inst *find_hw_inst_by_id_locked(struct go2001_dev *gdev,
+							u32 session_id)
+{
+	struct go2001_hw_inst *hw_inst;
+
+	list_for_each_entry(hw_inst, &gdev->inst_list, inst_entry)
+		if (hw_inst->session_id == session_id)
+			return hw_inst;
+
+	return NULL;
+}
+
+static bool go2001_sequence_passed(struct go2001_dev *gdev,
+				   u32 session_id, u32 seq_id)
+{
+	struct go2001_hw_inst *hw_inst;
+	unsigned long flags;
+	bool ret = true;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+
+	hw_inst = find_hw_inst_by_id_locked(gdev, session_id);
+	if (hw_inst)
+		ret = (hw_inst->last_reply_seq_id >= seq_id);
+
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	return ret;
+}
+
+static int go2001_wait_for_reply(struct go2001_dev *gdev, u32 session_id,
+				 u32 sequence_id)
+{
+	int ret;
+
+	ret = wait_event_timeout(gdev->reply_wq,
+			go2001_sequence_passed(gdev, session_id, sequence_id),
+			msecs_to_jiffies(GO2001_REPLY_TIMEOUT_MS));
+	if (ret == 0) {
+		go2001_err(gdev, "Timeout waiting for reply to %d/%d\n",
+			   session_id, sequence_id);
+		return -ETIMEDOUT;
+	}
+
+	go2001_dbg(gdev, 5, "Finished waiting for %d/%d\n",
+		   session_id, sequence_id);
+
+	return 0;
+}
+
+static inline bool go2001_ctx_idle(struct go2001_ctx *ctx)
+{
+	unsigned long flags1, flags2;
+	bool idle;
+
+	spin_lock_irqsave(&ctx->gdev->irqlock, flags1);
+	spin_lock_irqsave(&ctx->qlock, flags2);
+	idle = list_empty(&ctx->hw_inst.inst_entry) ||
+		(list_empty(&ctx->hw_inst.pending_list) && !ctx->job.src_buf);
+	spin_unlock_irqrestore(&ctx->qlock, flags2);
+	spin_unlock_irqrestore(&ctx->gdev->irqlock, flags1);
+
+	return idle;
+}
+
+void go2001_wait_for_ctx_done(struct go2001_ctx *ctx)
+{
+	/* No timeout, the watchdog will wake us up if needed. */
+	wait_event(ctx->gdev->reply_wq, go2001_ctx_idle(ctx));
+	go2001_wait_for_reply(ctx->gdev, ctx->hw_inst.session_id,
+			      ctx->hw_inst.sequence_id);
+}
+
+static int go2001_queue_msg_and_wait(struct go2001_ctx *ctx,
+				     struct go2001_msg *msg)
+{
+	u32 session_id = ctx->hw_inst.session_id;
+	u32 seqid;
+
+	/* msg becomes invalid after the call to go2001_queue_msg. */
+	seqid = go2001_queue_msg(ctx, msg);
+
+	return go2001_wait_for_reply(ctx->gdev, session_id, seqid);
+}
+
+static int go2001_queue_ctrl_msg_and_wait(struct go2001_dev *gdev,
+					  struct go2001_msg *msg)
+{
+	unsigned long flags;
+	u32 seqid;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+	seqid = go2001_queue_msg_locked(gdev, &gdev->ctrl_inst, msg);
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	go2001_dbg(gdev, 5, "Queued control msg seqid: %d\n", seqid);
+
+	go2001_send_pending(gdev);
+
+	return go2001_wait_for_reply(gdev, 0, seqid);
+}
+
+static int go2001_queue_init_msg_and_wait(struct go2001_ctx *ctx,
+					  struct go2001_msg *msg)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	unsigned long flags;
+	u32 seqid;
+
+	spin_lock_irqsave(&gdev->irqlock, flags);
+
+	seqid = go2001_queue_msg_locked(gdev, &gdev->ctrl_inst, msg);
+	if (ctx && !WARN_ON(!list_empty(&ctx->hw_inst.inst_entry))) {
+		go2001_dbg(gdev, 5, "New inst seq %d\n", seqid);
+		list_add_tail(&ctx->hw_inst.inst_entry, &gdev->new_inst_list);
+		/* Will use sequence_id to check if we got the
+		 * reply for the correct new ctx in IRQ.
+		 */
+		ctx->hw_inst.sequence_id = seqid;
+	}
+
+	spin_unlock_irqrestore(&gdev->irqlock, flags);
+
+	go2001_send_pending(gdev);
+
+	return go2001_wait_for_reply(gdev, 0, seqid);
+}
+
+int go2001_get_reply(struct go2001_dev *gdev, struct go2001_msg *msg)
+{
+	struct go2001_msg_ring *r = &gdev->rx_ring;
+	struct go2001_msg_hdr *hdr = msg_to_hdr(msg);
+	struct go2001_msg_ring_desc *desc = &r->desc;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&r->lock, flags);
+
+	if (go2001_ring_is_empty_locked(r)) {
+		go2001_dbg(gdev, 5, "Ring empty\n");
+		ret = -EAGAIN;
+		goto out;
+	}
+
+	memcpy_fromio(hdr, r->desc_iomem + desc->rd_off, desc->msg_size);
+	go2001_print_msg(gdev, msg, "RX: ");
+
+	desc->rd_off += desc->msg_size;
+	if (desc->rd_off >= desc->end_off)
+		desc->rd_off = desc->start_off;
+
+	iowrite32(desc->rd_off, r->desc_iomem +
+				offsetof(struct go2001_msg_ring_desc, rd_off));
+
+out:
+	spin_unlock_irqrestore(&r->lock, flags);
+	return ret;
+}
+
+static int go2001_init_decoder(struct go2001_ctx *ctx)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct go2001_init_decoder_param *param;
+	struct go2001_msg *msg;
+	unsigned long flags;
+	int ret;
+
+	if (!ctx->src_fmt) {
+		go2001_err(gdev, "Input format not set\n");
+		return -EINVAL;
+	}
+
+	go2001_dbg(gdev, 2, "Initializing decoder for format %s\n",
+		   ctx->src_fmt->desc);
+
+	msg = prepare_msg(gdev, GO2001_VM_INIT_DECODER, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+
+	param = msg_to_param(msg);
+	param->coded_fmt = ctx->src_fmt->hw_format;
+	param->concealment = 0;
+
+	ret = go2001_queue_init_msg_and_wait(ctx, msg);
+	spin_lock_irqsave(&ctx->qlock, flags);
+	if (ret || ctx->state == ERROR) {
+		go2001_err(gdev, "Failed initializing decoder\n");
+		ret = ret ? ret : -EIO;
+	}
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	return ret;
+}
+
+static int go2001_s_ctrl(struct go2001_ctx *ctx, enum go2001_hw_ctrl_type type,
+			 union go2001_hw_ctrl *ctrl)
+{
+	struct go2001_set_ctrl_param *param;
+	struct go2001_msg *msg;
+
+	msg = prepare_msg(ctx->gdev, GO2001_VM_SET_CTRL, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+
+	param = msg_to_param(msg);
+	param->type = type;
+
+	memcpy(&param->ctrl, ctrl, sizeof(*ctrl));
+
+	return go2001_queue_msg_and_wait(ctx, msg);
+}
+
+static int go2001_set_def_encoder_ctrls(struct go2001_ctx *ctx)
+{
+	union go2001_hw_ctrl hw_ctrl;
+	struct go2001_enc_coding_ctrl *ctrl = &hw_ctrl.coding_ctrl;
+
+	memset(&hw_ctrl, 0, sizeof(hw_ctrl));
+	ctrl->interp_filter_type = GO2001_CODING_CTRL_INTERP_FILTER_BICUBIC;
+	ctrl->deblock_filter_type = GO2001_CODING_CTRL_DEBLOCK_FILTER_NORMAL;
+	ctrl->deblock_filter_level = 64;
+	ctrl->deblock_filter_sharpness = 8;
+	ctrl->num_dct_parts = 1;
+	ctrl->error_resilient = 1;
+	ctrl->split_mv = GO2001_CODING_CTRL_MV_ADAPTIVE;
+	ctrl->quarter_pixel_mv = GO2001_CODING_CTRL_MV_ADAPTIVE;
+	ctrl->deadzone_enabled = 1;
+	ctrl->max_num_passes = 1;
+	ctrl->quality_metric = GO2001_CODING_CTRL_QM_SSIM;
+
+	return go2001_s_ctrl(ctx, GO2001_HW_CTRL_TYPE_CODING, &hw_ctrl);
+}
+
+static int go2001_init_encoder(struct go2001_ctx *ctx)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct go2001_init_encoder_param *param;
+	struct go2001_frame_info *finfo;
+	struct go2001_msg *msg;
+	int ret;
+
+	if (WARN_ON(!ctx->src_fmt || !ctx->dst_fmt ||
+		    !go2001_has_frame_info(ctx))) {
+		go2001_dbg(ctx->gdev, 2, "Formats not set\n");
+		return -EINVAL;
+	}
+
+	go2001_dbg(gdev, 2, "Initializing encoder for formats %s->%s at %dx%d\n",
+		   ctx->src_fmt->desc, ctx->dst_fmt->desc, ctx->finfo.width,
+		   ctx->finfo.height);
+
+	msg = prepare_msg(gdev, GO2001_VM_INIT_ENCODER, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+
+	param = msg_to_param(msg);
+	finfo = &ctx->finfo;
+
+	param->session_id = 0;
+	param->num_ref_frames = ctx->enc_params.multi_ref_frame_mode ? 1 : 3;
+	param->width = finfo->width;
+	param->height = finfo->height;
+	param->orig_width = finfo->width;
+	param->orig_height = finfo->height;
+	param->framerate_num = ctx->enc_params.framerate_num;
+	param->framerate_denom = ctx->enc_params.framerate_denom;
+	param->raw_fmt = ctx->src_fmt->hw_format;
+
+	ret = go2001_queue_init_msg_and_wait(ctx, msg);
+	if (ret || ctx->state == ERROR) {
+		go2001_err(gdev, "Failed initializing encoder\n");
+		return ret ? ret : -EIO;
+	}
+
+	return go2001_set_def_encoder_ctrls(ctx);
+}
+
+void go2001_release_codec(struct go2001_ctx *ctx)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct go2001_msg *msg;
+
+	go2001_dbg(gdev, 2, "Releasing session id %d, codec state %d\n",
+		   ctx->hw_inst.session_id, ctx->state);
+
+	if (ctx->hw_inst.session_id != 0) {
+		msg = prepare_msg(gdev, GO2001_VM_RELEASE, 0);
+		if (msg)
+			go2001_queue_msg_and_wait(ctx, msg);
+	}
+
+	/* Regardless of whether we sent and/or got a reply or not, clean up. */
+	go2001_release_hw_inst(gdev, &ctx->hw_inst);
+}
+
+int go2001_map_buffer(struct go2001_ctx *ctx, struct go2001_buffer *buf)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct device *dev = &gdev->pdev->dev;
+	struct go2001_set_mmap_param *param;
+	struct vb2_buffer *vb = &buf->vb;
+	struct go2001_dma_desc *dma_desc;
+	struct go2001_msg *msg;
+	struct go2001_mmap_list_desc *list_desc;
+	unsigned int i;
+
+	if (buf->mapped) {
+		go2001_err(gdev, "Buffer already mapped\n");
+		return -EINVAL;
+	}
+
+	if (vb->num_planes > GO2001_MMAP_MAX_ENTRIES) {
+		go2001_err(gdev, "Too many planes to map\n");
+		return -EIO;
+	}
+
+	msg = prepare_msg(gdev, GO2001_VM_SET_MMAP, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+	param = msg_to_param(msg);
+	param->dir = V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) ?
+		     GO2001_VSM_DIR_IN : GO2001_VSM_DIR_OUT;
+	param->count = vb->num_planes;
+	for (i = 0; i < vb->num_planes; ++i) {
+		dma_desc = &buf->dma_desc[i];
+		list_desc = &param->mmap_list_desc[i];
+
+		dma_desc->map_addr = dma_desc->mmap_list[0].dma_addr;
+
+		list_desc->first_entry_dma_addr = dma_desc->map_addr;
+		list_desc->entry_count = dma_desc->num_entries;
+		list_desc->mmap_list_addr = dma_desc->dma_addr;
+
+		go2001_dbg(gdev, 4, "Mapping plane %u: 0x%08llx, chunks: %d in HW\n",
+			   i, dma_desc->map_addr, dma_desc->num_entries);
+		go2001_print_mmap_list(gdev, dma_desc);
+		dma_cache_sync(dev, dma_desc->mmap_list, dma_desc->list_size,
+			       DMA_TO_DEVICE);
+	}
+
+	go2001_queue_msg(ctx, msg);
+
+	buf->mapped = true;
+
+	return 0;
+}
+
+void go2001_unmap_buffer(struct go2001_ctx *ctx, struct go2001_buffer *buf)
+{
+	struct go2001_release_mmap_param *param;
+	struct go2001_dev *gdev = ctx->gdev;
+	struct vb2_buffer *vb = &buf->vb;
+	struct go2001_msg *msg;
+	unsigned int i;
+
+	if (!buf->mapped) {
+		go2001_dbg(gdev, 1, "Buffer not mapped\n");
+		return;
+	}
+
+	if (vb->num_planes > GO2001_MMAP_MAX_ENTRIES) {
+		go2001_dbg(gdev, 1, "Too many planes\n");
+		return;
+	}
+
+	go2001_dbg(gdev, 3, "Unmapping buffer %p from HW\n", buf);
+
+	msg = prepare_msg(gdev, GO2001_VM_RELEASE_MMAP, sizeof(*param));
+	if (!msg)
+		return;
+
+	param = msg_to_param(msg);
+	param->dir = V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type) ?
+		     GO2001_VSM_DIR_IN :
+		     GO2001_VSM_DIR_OUT;
+	param->count = vb->num_planes;
+	for (i = 0; i < vb->num_planes; ++i) {
+		param->addr[i] = buf->dma_desc[i].map_addr;
+		go2001_dbg(gdev, 4, "Unmapping plane %u, 0x%08llx from HW\n",
+			   i, buf->dma_desc[i].map_addr);
+	}
+
+	go2001_queue_msg_and_wait(ctx, msg);
+
+	buf->mapped = false;
+}
+
+int go2001_unmap_buffers(struct go2001_ctx *ctx, bool unmap_src, bool unmap_dst)
+{
+	struct go2001_release_mmap_param *param;
+	struct go2001_msg *msg;
+
+	if (WARN_ON(!unmap_src && !unmap_dst))
+		return 0;
+
+	msg = prepare_msg(ctx->gdev, GO2001_VM_RELEASE_MMAP, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+	param = msg_to_param(msg);
+	param->dir |= (unmap_src ? GO2001_VSM_DIR_IN : 0);
+	param->dir |= (unmap_dst ? GO2001_VSM_DIR_OUT : 0);
+
+	return go2001_queue_msg_and_wait(ctx, msg);
+}
+
+static int go2001_build_dec_msg(struct go2001_ctx *ctx, struct go2001_msg *msg,
+				struct go2001_buffer *src_buf,
+				struct go2001_buffer *dst_buf)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct go2001_empty_buffer_dec_param *param;
+	int i;
+
+	assert_spin_locked(&ctx->qlock);
+
+	if (!src_buf->mapped || (dst_buf && !dst_buf->mapped)) {
+		go2001_err(gdev, "Buffer(s) not mapped!\n");
+		return -EINVAL;
+	}
+
+	param = msg_to_param(msg);
+
+	param->in_addr = src_buf->dma_desc[0].map_addr;
+	param->payload_size = vb2_get_plane_payload(&src_buf->vb, 0);
+	if (dst_buf) {
+		if (WARN_ON(dst_buf->vb.num_planes >
+					ARRAY_SIZE(param->out_addr)))
+			return -EINVAL;
+
+		for (i = 0; i < dst_buf->vb.num_planes; ++i) {
+			param->out_addr[i] = dst_buf->dma_desc[i].map_addr;
+			WARN_ON(!IS_ALIGNED(param->out_addr[i], 16));
+		}
+
+		if (!ctx->dst_fmt) {
+			go2001_err(gdev, "Destination format not set\n");
+			return -EINVAL;
+		}
+		param->raw_fmt = ctx->dst_fmt->hw_format;
+	}
+
+	param->flags = ctx->need_resume ?
+		       G02001_EMPTY_BUF_DEC_FLAG_RES_CHANGE_DONE :
+		       0;
+	ctx->need_resume = false;
+
+	return 0;
+}
+
+static void go2001_update_enc_params(struct go2001_ctx *ctx,
+			struct go2001_runtime_enc_params *rt_enc_params) {
+	unsigned long *changed_mask;
+	struct go2001_enc_params *new_params;
+
+	if (!rt_enc_params->changed_mask)
+		return;
+
+	changed_mask = rt_enc_params->changed_mask;
+	new_params = &rt_enc_params->enc_params;
+
+	if (test_and_clear_bit(GO2001_BITRATE_CHANGE, changed_mask))
+		ctx->enc_params.bitrate = new_params->bitrate;
+
+	if (test_and_clear_bit(GO2001_FRAMERATE_CHANGE, changed_mask)) {
+		ctx->enc_params.framerate_num =	new_params->framerate_num;
+		ctx->enc_params.framerate_denom = new_params->framerate_denom;
+	}
+
+	if (test_and_clear_bit(GO2001_KEYFRAME_REQUESTED, changed_mask))
+		ctx->enc_params.request_keyframe = new_params->request_keyframe;
+}
+
+static int go2001_build_enc_msg(struct go2001_ctx *ctx, struct go2001_msg *msg,
+				struct go2001_buffer *src_buf,
+				struct go2001_buffer *dst_buf)
+{
+	struct go2001_empty_buffer_enc_param *param;
+	struct go2001_dev *gdev = ctx->gdev;
+	int i;
+
+	if (WARN_ON(!src_buf || !dst_buf))
+		return -EINVAL;
+
+	assert_spin_locked(&ctx->qlock);
+
+	if (!src_buf->mapped || !dst_buf->mapped) {
+		go2001_err(gdev, "Buffer(s) not mapped!\n");
+		return -EINVAL;
+	}
+
+	param = msg_to_param(msg);
+
+	if (WARN_ON(src_buf->vb.num_planes > ARRAY_SIZE(param->in_addr)))
+		return -EINVAL;
+
+	for (i = 0; i < src_buf->vb.num_planes; ++i) {
+		param->in_addr[i] = src_buf->dma_desc[i].map_addr;
+		WARN_ON(!IS_ALIGNED(param->in_addr[i], 16));
+	}
+	param->out_addr = dst_buf->dma_desc[0].map_addr;
+	param->out_size = vb2_plane_size(&dst_buf->vb, 0);
+
+	go2001_update_enc_params(ctx, &src_buf->rt_enc_params);
+	if (ctx->enc_params.request_keyframe) {
+		param->frame_type = GO2001_EMPTY_BUF_ENC_FRAME_KEYFRAME;
+		ctx->enc_params.frames_since_intra = 0;
+		ctx->enc_params.request_keyframe = false;
+	} else {
+		param->frame_type = GO2001_EMPTY_BUF_ENC_FRAME_PRED;
+	}
+
+	if (WARN_ON(ctx->enc_params.framerate_num == 0))
+		return -EINVAL;
+
+	param->time_increment = GO2001_MAX_FPS / ctx->enc_params.framerate_num;
+	param->bits_per_sec = ctx->enc_params.bitrate;
+	ctx->enc_params.bitrate = 0;
+
+	if (!ctx->enc_params.multi_ref_frame_mode ||
+	    ctx->enc_params.frames_since_intra % 4 == 0) {
+		/* Frame controls for temporal layer 0. */
+		param->ipf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE_AND_REFRESH;
+		param->grf_frame_ctrl = GO2001_FRM_CTRL_NO_REFRESH;
+		param->arf_frame_ctrl = GO2001_FRM_CTRL_NO_REFRESH;
+	} else if (ctx->enc_params.frames_since_intra % 2 == 0) {
+		/* Frame controls for temporal layer 1. */
+		param->ipf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE;
+		param->grf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE_AND_REFRESH;
+		param->arf_frame_ctrl = GO2001_FRM_CTRL_NO_REFRESH;
+	} else {
+		/* Frame controls for temporal layer 2. */
+		param->ipf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE;
+		param->grf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE;
+		param->arf_frame_ctrl = GO2001_FRM_CTRL_REFERENCE_AND_REFRESH;
+	}
+	ctx->enc_params.frames_since_intra++;
+
+	return 0;
+}
+
+static void go2001_flush(struct go2001_ctx *ctx, struct go2001_buffer *src_buf)
+{
+	assert_spin_locked(&ctx->qlock);
+
+	go2001_dbg(ctx->gdev, 4, "Flushing at src_buf ts=%llu\n",
+		   src_buf->vb.timestamp);
+
+	/*
+	 * Since VPX has no frame reordering and buffers are returned as
+	 * soon as they are decoded, there is no need trigger anything on the
+	 * destination queue. Just return the flush buffer to userspace.
+	 */
+	list_del(&src_buf->list);
+	vb2_buffer_done(&src_buf->vb, VB2_BUF_STATE_DONE);
+}
+
+int go2001_prepare_gbuf(struct go2001_ctx *ctx, struct go2001_buffer *gbuf,
+			bool is_src)
+{
+	struct go2001_msg *msg;
+	size_t size;
+
+	if (!is_src)
+		return 0;
+
+	if (WARN_ON(gbuf->msg))
+		return -EINVAL;
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER)
+		size = sizeof(struct go2001_empty_buffer_dec_param);
+	else
+		size = sizeof(struct go2001_empty_buffer_enc_param);
+
+	msg = prepare_msg(ctx->gdev, GO2001_VM_EMPTY_BUFFER, size);
+	if (!msg)
+		return -ENOMEM;
+
+	gbuf->msg = msg;
+	return 0;
+}
+
+void go2001_finish_gbuf(struct go2001_ctx *ctx, struct go2001_buffer *gbuf)
+{
+	if (gbuf->msg) {
+		free_msg(ctx->gdev, gbuf->msg);
+		gbuf->msg = NULL;
+	}
+}
+
+int go2001_schedule_frames(struct go2001_ctx *ctx)
+{
+	struct go2001_dev *gdev = ctx->gdev;
+	struct go2001_job *job = &ctx->job;
+	struct go2001_msg *msg = NULL;
+	struct go2001_buffer *src_buf;
+	struct go2001_buffer *dst_buf;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&ctx->qlock, flags);
+	if (job->src_buf) {
+		go2001_dbg(gdev, 5, "Job already running\n");
+		goto out;
+	}
+
+	if (WARN_ON(job->dst_buf)) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	go2001_dbg(gdev, 5, "State: %d\n", ctx->state);
+again:
+	src_buf = NULL;
+	dst_buf = NULL;
+
+	switch (ctx->state) {
+	case NEED_HEADER_INFO:
+		if (WARN_ON(ctx->codec_mode == CODEC_MODE_ENCODER)) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		if (!list_empty(&ctx->src_buf_q)) {
+			src_buf = list_first_entry(&ctx->src_buf_q,
+						   struct go2001_buffer, list);
+		}
+		break;
+
+	case RUNNING:
+		if (!list_empty(&ctx->src_buf_q) &&
+		    !list_empty(&ctx->dst_buf_q)) {
+			src_buf = list_first_entry(&ctx->src_buf_q,
+						   struct go2001_buffer, list);
+			dst_buf = list_first_entry(&ctx->dst_buf_q,
+						   struct go2001_buffer, list);
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	if (!src_buf)
+		goto out;
+
+	msg = src_buf->msg;
+	if (WARN_ON(!msg))
+		goto out;
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER) {
+		if (vb2_get_plane_payload(&src_buf->vb, 0) == 0) {
+			/* Flush buffer */
+			go2001_flush(ctx, src_buf);
+			goto again;
+		}
+
+		ret = go2001_build_dec_msg(ctx, msg, src_buf, dst_buf);
+	} else {
+		ret = go2001_build_enc_msg(ctx, msg, src_buf, dst_buf);
+	}
+	if (ret)
+		goto out;
+
+	job->src_buf = src_buf;
+	if (dst_buf)
+		job->dst_buf = dst_buf;
+
+	src_buf->msg = NULL;
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+
+	go2001_queue_msg(ctx, msg);
+	return 0;
+out:
+	if (ret) {
+		go2001_set_ctx_state(ctx, ERROR);
+		go2001_err(gdev, "Error scheduling frames\n");
+	}
+
+	spin_unlock_irqrestore(&ctx->qlock, flags);
+	return ret;
+}
+
+static int go2001_query_hw_version(struct go2001_dev *gdev)
+{
+	struct go2001_msg *msg;
+
+	msg = prepare_msg(gdev, GO2001_VM_GET_VERSION, 0);
+	if (!msg)
+		return -ENOMEM;
+
+	return go2001_queue_ctrl_msg_and_wait(gdev, msg);
+}
+
+static int go2001_set_log_level(struct go2001_dev *gdev, u32 level)
+{
+	struct go2001_set_log_level_param *param;
+	struct go2001_msg *msg;
+
+	if (level != GO2001_LOG_LEVEL_DISABLED && level > GO2001_LOG_LEVEL_MAX)
+		level = GO2001_LOG_LEVEL_MAX;
+
+	msg = prepare_msg(gdev, GO2001_VM_SET_LOG_LEVEL, sizeof(*param));
+	if (!msg)
+		return -ENOMEM;
+
+	param = msg_to_param(msg);
+	param->level = level;
+
+	return go2001_queue_ctrl_msg_and_wait(gdev, msg);
+}
+
+int go2001_init_codec(struct go2001_ctx *ctx)
+{
+	int ret = 0;
+
+	if (WARN_ON(ctx->hw_inst.session_id != 0))
+		return -EINVAL;
+
+	if (ctx->codec_mode == CODEC_MODE_DECODER)
+		ret = go2001_init_decoder(ctx);
+	else
+		ret = go2001_init_encoder(ctx);
+
+	return ret;
+}
+
+int go2001_init(struct go2001_dev *gdev)
+{
+	int ret;
+
+	WARN_ON(!mutex_is_locked(&gdev->lock));
+
+	WARN_ON(!list_empty(&gdev->inst_list));
+	INIT_LIST_HEAD(&gdev->inst_list);
+
+	WARN_ON(!list_empty(&gdev->new_inst_list));
+	INIT_LIST_HEAD(&gdev->new_inst_list);
+
+	go2001_init_hw_inst(&gdev->ctrl_inst, 0);
+	list_add_tail(&gdev->ctrl_inst.inst_entry, &gdev->inst_list);
+	gdev->curr_hw_inst = &gdev->ctrl_inst;
+
+	ret = go2001_load_firmware(gdev);
+	if (ret) {
+		go2001_err(gdev, "Failed loading firmware\n");
+		return ret;
+	}
+
+	ret = go2001_init_messaging(gdev);
+	if (ret) {
+		go2001_err(gdev, "Failed to init messaging\n");
+		return ret;
+	}
+
+	ret = go2001_query_hw_version(gdev);
+	if (ret) {
+		go2001_err(gdev, "Failed querying HW version\n");
+		return ret;
+	}
+
+	ret = go2001_set_log_level(gdev, go2001_fw_debug_level);
+	if (ret) {
+		go2001_err(gdev, "Failed setting log level\n");
+		return ret;
+	}
+
+	return 0;
+}
diff --git a/drivers/media/pci/go2001/go2001_hw.h b/drivers/media/pci/go2001/go2001_hw.h
new file mode 100644
index 0000000..5cbfd49
--- /dev/null
+++ b/drivers/media/pci/go2001/go2001_hw.h
@@ -0,0 +1,55 @@
+/*
+ *  go2001 - GO2001 codec driver.
+ *
+ *  Author : Pawel Osciak <posciak@xxxxxxxxxxxx>
+ *
+ *  Copyright (C) 2017 Google, Inc.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MEDIA_PCI_GO2001_GO2001_HW_H_
+#define _MEDIA_PCI_GO2001_GO2001_HW_H_
+
+#include "go2001.h"
+
+int go2001_map_iomem(struct go2001_dev *gdev);
+void go2001_unmap_iomem(struct go2001_dev *gdev);
+
+int go2001_init(struct go2001_dev *gdev);
+
+int go2001_init_codec(struct go2001_ctx *ctx);
+void go2001_release_codec(struct go2001_ctx *ctx);
+
+int go2001_set_dec_raw_fmt(struct go2001_ctx *ctx);
+
+int go2001_map_buffer(struct go2001_ctx *ctx, struct go2001_buffer *buf);
+void go2001_unmap_buffer(struct go2001_ctx *ctx, struct go2001_buffer *buf);
+int go2001_unmap_buffers(struct go2001_ctx *ctx, bool unmap_src,
+			 bool unmap_dst);
+
+int go2001_prepare_gbuf(struct go2001_ctx *ctx, struct go2001_buffer *gbuf,
+			bool is_src);
+void go2001_finish_gbuf(struct go2001_ctx *ctx, struct go2001_buffer *gbuf);
+int go2001_schedule_frames(struct go2001_ctx *ctx);
+void go2001_wait_for_ctx_done(struct go2001_ctx *ctx);
+void go2001_send_pending(struct go2001_dev *gdev);
+void go2001_cancel_hw_inst_locked(struct go2001_dev *gdev,
+				  struct go2001_hw_inst *hw_inst);
+void go2001_cancel_all_hw_inst_locked(struct go2001_dev *gdev);
+
+void go2001_init_hw_inst(struct go2001_hw_inst *inst, u32 inst_id);
+
+int go2001_get_reply(struct go2001_dev *gdev, struct go2001_msg *msg);
+
+#endif /* _MEDIA_PCI_GO2001_GO2001_HW_H_ */
diff --git a/drivers/media/pci/go2001/go2001_proto.h b/drivers/media/pci/go2001/go2001_proto.h
new file mode 100644
index 0000000..a5f8b67
--- /dev/null
+++ b/drivers/media/pci/go2001/go2001_proto.h
@@ -0,0 +1,359 @@
+/*
+ *  go2001 - GO2001 codec driver.
+ *
+ *  Author : Pawel Osciak <posciak@xxxxxxxxxxxx>
+ *
+ *  Copyright (C) 2017 Google, Inc.
+ *
+ *  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.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MEDIA_PCI_GO2001_GO2001_PROTO_H_
+#define _MEDIA_PCI_GO2001_GO2001_PROTO_H_
+
+struct go2001_msg_ring_desc {
+	u32 msg_size;
+	u32 start_off;
+	u32 end_off;
+	u32 wr_off;
+	u32 rd_off;
+} __packed;
+
+#define GO2001_CTRL_SESSION_ID	0
+struct go2001_msg_hdr {
+	u32 size;
+	u32 session_id;
+	u32 sequence_id;
+	u32 type;
+	u32 status;
+} __packed;
+
+#define GO2001_MAX_MSG_PAYLOAD_SIZE	SZ_256
+struct go2001_msg_payload {
+	struct go2001_msg_hdr hdr;
+	u8 param[GO2001_MAX_MSG_PAYLOAD_SIZE - sizeof(struct go2001_msg_hdr)];
+} __packed;
+
+#define go2001_calc_payload_size(param_size) \
+	(sizeof(struct go2001_msg_hdr) + (param_size))
+
+enum go2001_msg_status {
+	GO2001_STATUS_OK = 0,
+	GO2001_STATUS_FAIL = 1,
+	GO2001_STATUS_RES_NA = 2,
+	GO2001_STATUS_INVALID_PARAM = 3,
+	GO2001_STATUS_NOT_IMPLEMENTED = 4,
+	GO2001_STATUS_NEW_PICTURE_SIZE = 5,
+	GO2001_STATUS_WAITING_PICTURE_SIZE_CHANGED = 6,
+	GO2001_STATUS_STREAM_ERROR = 7,
+	GO2001_STATUS_NO_OUTPUT = 8,
+	GO2001_STATUS_INFO_NOT_READY = 9,
+	GO2001_STATUS_RESTART_SYS = 10,
+};
+
+enum go2001_msg_type {
+	GO2001_VM_INIT_DECODER = 0x100,
+	GO2001_VM_INIT_ENCODER = 0x101,
+	GO2001_VM_INIT_PASSTHROUGH = 0x102,
+	GO2001_VM_GET_VERSION = 0x104,
+	GO2001_VM_SET_MMAP = 0x105,
+	GO2001_VM_RELEASE_MMAP = 0x106,
+	GO2001_VM_EMPTY_BUFFER = 0x107,
+	GO2001_VM_GET_INFO = 0x108,
+	GO2001_VM_SET_CTRL = 0x109,
+	GO2001_VM_GET_CTRL = 0x10a,
+	GO2001_VM_RELEASE = 0x10b,
+	GO2001_VM_RELEASE_ALL = 0x10c,
+	GO2001_VM_EVENT_ASSERT = 0x200,
+	GO2001_VM_EVENT_LOG = 0x201,
+	GO2001_VM_SET_LOG_LEVEL = 0x300,
+};
+
+#define GO2001_MSG_RING_MEM_OFFSET	0x401000
+#define GO2001_MSG_RING_MEM_SIZE	0x2000
+#define GO2001_RX_RING_DESC_OFFSET	0x0
+#define GO2001_TX_RING_DESC_OFFSET	0x100
+
+#define GO2001_FMT_NV12			0x20001
+#define GO2001_FMT_NV12_TILED_8X4	0x20002
+#define GO2001_FMT_ARGB			0x20003
+
+enum go2001_hw_format_coded {
+	GO2001_FMT_VP8 = 1,
+	GO2001_FMT_VP9 = 2,
+};
+
+enum go2001_hw_format_raw {
+	GO2001_FMT_YUV420_PLANAR = 0,
+	GO2001_FMT_YUV420_SEMIPLANAR = 1,
+	GO2001_FMT_YUV420_SEMIPLANAR_VU = 2,
+	GO2001_FMT_YUV422_INTERLEAVED_YUYV = 3,
+	GO2001_FMT_YUV422_INTERLEAVED_UYVY = 4,
+	GO2001_FMT_RGB565 = 5,
+	GO2001_FMT_BGR565 = 6,
+	GO2001_FMT_RGB555 = 7,
+	GO2001_FMT_BGR555 = 8,
+	GO2001_FMT_RGB444 = 9,
+	GO2001_FMT_BGR444 = 10,
+	GO2001_FMT_RGB888 = 11,
+	GO2001_FMT_BGR888 = 12,
+	GO2001_FMT_RGB101010 = 13,
+	GO2001_FMT_BGR101010 = 14,
+};
+
+struct go2001_init_decoder_param {
+	u32 coded_fmt;
+	u32 concealment;
+} __packed;
+
+struct go2001_init_decoder_reply {
+	u32 session_id;
+	u32 input_address;
+	u32 input_buffer_size;
+	u32 output_address;
+} __packed;
+
+struct go2001_init_encoder_param {
+	u32 session_id;
+	u32 num_ref_frames;
+	u32 width;
+	u32 height;
+	u32 orig_width;
+	u32 orig_height;
+	u32 framerate_num;
+	u32 framerate_denom;
+	u32 raw_fmt;
+} __packed;
+
+struct go2001_init_encoder_reply {
+} __packed;
+
+struct go2001_get_info_reply {
+	u32 vpx_version;
+	u32 vpx_profile;
+	u32 visible_width;
+	u32 visible_height;
+	u32 coded_width;
+	u32 coded_height;
+	u32 scaled_width;
+	u32 scaled_height;
+} __packed;
+
+struct go2001_get_version_reply {
+	u32 hw_ver;
+	u32 sw_ver;
+	u32 vp8dec_hw_ver;
+	u32 vp8dec_sw_ver;
+	u32 vp8enc_hw_ver;
+	u32 vp8enc_sw_ver;
+	u32 vp9dec_hw_ver;
+	u32 vp9dec_sw_ver;
+} __packed;
+
+struct go2001_enc_coding_ctrl_area {
+	u32 enabled;
+	u32 top;
+	u32 left;
+	u32 bottom;
+	u32 right;
+} __packed;
+
+#define GO2001_CODING_CTRL_INTERP_FILTER_BICUBIC	0x0
+#define GO2001_CODING_CTRL_INTERP_FILTER_BILINEAR	0x1
+#define GO2001_CODING_CTRL_INTERP_FILTER_NONE		0x2
+
+#define GO2001_CODING_CTRL_DEBLOCK_FILTER_NORMAL	0x0
+#define GO2001_CODING_CTRL_DEBLOCK_FILTER_SIMPLE	0x1
+
+#define GO2001_CODING_CTRL_MV_DISABLED		0x0
+#define GO2001_CODING_CTRL_MV_ADAPTIVE		0x1
+#define GO2001_CODING_CTRL_MV_ENABLED		0x2
+
+#define GO2001_CODING_CTRL_QM_PSNR	0x0
+#define GO2001_CODING_CTRL_QM_SSIM	0x1
+struct go2001_enc_coding_ctrl {
+	u32 interp_filter_type;
+	u32 deblock_filter_type;
+	u32 deblock_filter_level;
+	u32 deblock_filter_sharpness;
+	u32 num_dct_parts;
+	u32 error_resilient;
+	u32 split_mv;
+	u32 quarter_pixel_mv;
+	u32 cir_start;
+	u32 cir_interval;
+	struct go2001_enc_coding_ctrl_area intra_area;
+	struct go2001_enc_coding_ctrl_area roi1_area;
+	struct go2001_enc_coding_ctrl_area roi2_area;
+	s32 roi1_delta_qp;
+	s32 roi2_delta_qp;
+	u32 deadzone_enabled;
+	u32 max_num_passes;
+	u32 quality_metric;
+	s32 qp_delta[5];
+	s32 adaptive_roi;
+	s32 adaptive_roi_color;
+} __packed;
+
+struct go2001_enc_rate_ctrl {
+} __packed;
+
+struct go2001_enc_preprocess_ctrl {
+} __packed;
+
+enum go2001_hw_ctrl_type {
+	GO2001_HW_CTRL_TYPE_RATE = 1,
+	GO2001_HW_CTRL_TYPE_CODING = 2,
+	GO2001_HW_CTRL_TYPE_PREPROCESS = 3,
+};
+
+union go2001_hw_ctrl {
+	struct go2001_enc_rate_ctrl rate_ctrl;
+	struct go2001_enc_coding_ctrl coding_ctrl;
+	struct go2001_enc_preprocess_ctrl prep_ctrl;
+} __packed;
+
+struct go2001_set_ctrl_param {
+	u32 type;
+	union go2001_hw_ctrl ctrl;
+} __packed;
+
+struct go2001_set_ctrl_reply {
+} __packed;
+
+#define G02001_EMPTY_BUF_DEC_FLAG_RES_CHANGE_DONE	0x1
+struct go2001_empty_buffer_dec_param {
+	u64 in_addr;
+	u32 payload_size;
+	u64 out_addr[2];
+	u32 flags;
+	u32 raw_fmt;
+} __packed;
+
+struct go2001_empty_buffer_dec_reply {
+	struct go2001_get_info_reply info;
+	u32 intra_frame;
+	u32 golden_frame;
+	u32 num_error_mbs;
+	u32 num_slice_rows;
+} __packed;
+
+#define GO2001_EMPTY_BUF_ENC_FRAME_KEYFRAME	0x0
+#define GO2001_EMPTY_BUF_ENC_FRAME_PRED		0x1
+
+enum go2001_enc_frame_control {
+	GO2001_FRM_CTRL_NO_REFRESH = 0,
+	GO2001_FRM_CTRL_REFERENCE = 1,
+	GO2001_FRM_CTRL_REFRESH = 2,
+	GO2001_FRM_CTRL_REFERENCE_AND_REFRESH = 3,
+};
+
+struct go2001_empty_buffer_enc_param {
+	u64 in_addr[3];
+	u64 out_addr;
+	u32 out_size;
+	u32 frame_type;
+	u32 time_increment;
+	u64 stab_in_addr;
+	u32 ipf_frame_ctrl;
+	u32 grf_frame_ctrl;
+	u32 arf_frame_ctrl;
+	u32 layer_id;
+	u32 bits_per_sec;
+} __packed;
+
+#define VP8_MAX_NUM_PARTITIONS 9
+struct go2001_empty_buffer_enc_reply {
+	u32 frame_type;
+	u32 partition_off[VP8_MAX_NUM_PARTITIONS];
+	u32 partition_size[VP8_MAX_NUM_PARTITIONS];
+	u32 payload_size;
+	u32 ipf_frame_ctrl;
+	u32 grf_frame_ctrl;
+	u32 arf_frame_ctrl;
+} __packed;
+
+struct go2001_mmap_list_desc {
+	u64 first_entry_dma_addr;
+	u32 entry_count;
+	u64 mmap_list_addr;
+} __packed;
+
+#define GO2001_VSM_DIR_IN	BIT(0)
+#define GO2001_VSM_DIR_OUT	BIT(1)
+#define GO2001_MMAP_MAX_ENTRIES	9
+struct go2001_set_mmap_param {
+	u32 dir;
+	u32 count;
+	struct go2001_mmap_list_desc mmap_list_desc[GO2001_MMAP_MAX_ENTRIES];
+} __packed;
+
+struct go2001_mmap_list_entry {
+	u64 dma_addr;
+	u32 size;
+} __packed;
+
+struct go2001_release_mmap_param {
+	u32 dir;
+	u32 count;
+	u64 addr[GO2001_MMAP_MAX_ENTRIES];
+} __packed;
+
+struct go2001_event_assert_reply {
+	u8 filename[32];
+	u8 funcname[32];
+	u8 expr[32];
+	u32 line_no;
+} __packed;
+
+struct go2001_event_log_reply {
+	u8 data[128];
+} __packed;
+
+#define GO2001_LOG_LEVEL_MAX		5
+#define GO2001_LOG_LEVEL_DISABLED	0xFFFFFFFF
+struct go2001_set_log_level_param {
+	u32 level;
+} __packed;
+
+struct go2001_set_log_level_reply {
+	u32 level;
+} __packed;
+
+struct go2001_boot_hdr {
+	u32 signature;
+	u32 entry_addr;
+	u32 size;
+	u32 checksum;
+} __packed;
+
+#define GO2001_FW_HDR_OFF	0x20afc0
+#define GO2001_FW_STOP		0x212010
+#define GO2001_FW_STOP_BIT	BIT(20)
+
+#define GO2001_BOOT_FW_NAME		"go2001-boot.fw"
+#define GO2001_BOOT_FW_OFF		0x207000
+#define GO2001_BOOT_FW_ENTRY_BASE	0xd0000000
+
+#define GO2001_FW_NAME		"go2001.fw"
+#define GO2001_FW_OFF		0
+#define GO2001_FW_ENTRY_BASE	0
+
+#define GO2001_FW_SIGNATURE \
+(((u32)'P') | (((u32)'C') << 8) | (((u32)'I') << 16) | (((u32)'E') << 24))
+#define GO2001_FW_DONE_SIGNATURE \
+(((u32)'D') | (((u32)'O') << 8) | (((u32)'N') << 16) | (((u32)'E') << 24))
+
+#define GO2001_FW_MAX_SIZE	SZ_1M
+
+#endif /* _MEDIA_PCI_GO2001_GO2001_PROTO_H_ */
-- 
2.7.4