text: /* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 and
   * only version 2 as published by the Free Software Foundation.
   *
   * 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.
   *
   */
  
  #include <linux/sched.h>
  #include <linux/slab.h>
  #include <media/msm_vidc.h>
  #include "msm_vidc_internal.h"
  #include "msm_vidc_debug.h"
  #include "msm_vdec.h"
  #include "msm_venc.h"
  #include "msm_vidc_common.h"
  #include <linux/delay.h>
  #include "vidc_hfi_api.h"
  
  #define MAX_EVENTS 30
  
  static int get_poll_flags(void *instance)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct vb2_queue *outq = &inst->bufq[OUTPUT_PORT].vb2_bufq;
  	struct vb2_queue *capq = &inst->bufq[CAPTURE_PORT].vb2_bufq;
  	struct vb2_buffer *out_vb = NULL;
  	struct vb2_buffer *cap_vb = NULL;
  	unsigned long flags;
  	int rc = 0;
  
  	if (v4l2_event_pending(&inst->event_handler))
  		rc |= POLLPRI;
  
  	spin_lock_irqsave(&capq->done_lock, flags);
  	if (!list_empty(&capq->done_list))
  		cap_vb = list_first_entry(&capq->done_list, struct vb2_buffer,
  								done_entry);
  	if (cap_vb && (cap_vb->state == VB2_BUF_STATE_DONE
  				|| cap_vb->state == VB2_BUF_STATE_ERROR))
  		rc |= POLLIN | POLLRDNORM;
  	spin_unlock_irqrestore(&capq->done_lock, flags);
  
  	spin_lock_irqsave(&outq->done_lock, flags);
  	if (!list_empty(&outq->done_list))
  		out_vb = list_first_entry(&outq->done_list, struct vb2_buffer,
  								done_entry);
  	if (out_vb && (out_vb->state == VB2_BUF_STATE_DONE
  				|| out_vb->state == VB2_BUF_STATE_ERROR))
  		rc |= POLLOUT | POLLWRNORM;
  	spin_unlock_irqrestore(&outq->done_lock, flags);
  
  	return rc;
  }
  
  int msm_vidc_poll(void *instance, struct file *filp,
  		struct poll_table_struct *wait)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct vb2_queue *outq = NULL;
  	struct vb2_queue *capq = NULL;
  
  	if (!inst)
  		return -EINVAL;
  
  	outq = &inst->bufq[OUTPUT_PORT].vb2_bufq;
  	capq = &inst->bufq[CAPTURE_PORT].vb2_bufq;
  
  	poll_wait(filp, &inst->event_handler.wait, wait);
  	poll_wait(filp, &capq->done_wq, wait);
  	poll_wait(filp, &outq->done_wq, wait);
  	return get_poll_flags(inst);
  }
  EXPORT_SYMBOL(msm_vidc_poll);
  
  /* Kernel client alternative for msm_vidc_poll */
  int msm_vidc_wait(void *instance)
  {
  	struct msm_vidc_inst *inst = instance;
  	int rc = 0;
  
  	if (!inst)
  		return -EINVAL;
  
  	wait_event(inst->kernel_event_queue, (rc = get_poll_flags(inst)));
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_wait);
  
  int msm_vidc_get_iommu_domain_partition(void *instance, u32 flags,
  		enum v4l2_buf_type buf_type, int *domain, int *partition)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !inst->core || !inst->core->device)
  		return -EINVAL;
  
  	return msm_comm_get_domain_partition(inst, flags, buf_type, domain,
  		partition);
  }
  EXPORT_SYMBOL(msm_vidc_get_iommu_domain_partition);
  
  int msm_vidc_querycap(void *instance, struct v4l2_capability *cap)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !cap)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_querycap(instance, cap);
  	else if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_querycap(instance, cap);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_querycap);
  
  int msm_vidc_s_parm(void *instance,
  		struct v4l2_streamparm *a)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !a)
  		return -EINVAL;
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_s_parm(instance, a);
  	else if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_s_parm(instance, a);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_s_parm);
  
  int msm_vidc_enum_fmt(void *instance, struct v4l2_fmtdesc *f)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !f)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_enum_fmt(instance, f);
  	else if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_enum_fmt(instance, f);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_enum_fmt);
  
  int msm_vidc_s_fmt(void *instance, struct v4l2_format *f)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !f)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_s_fmt(instance, f);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_s_fmt(instance, f);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_s_fmt);
  
  int msm_vidc_g_fmt(void *instance, struct v4l2_format *f)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !f)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_g_fmt(instance, f);
  	else if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_g_fmt(instance, f);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_g_fmt);
  
  int msm_vidc_s_ctrl(void *instance, struct v4l2_control *control)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !control)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_s_ctrl(instance, control);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_s_ctrl(instance, control);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_s_ctrl);
  
  int msm_vidc_g_ctrl(void *instance, struct v4l2_control *control)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !control)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_g_ctrl(instance, control);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_g_ctrl(instance, control);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_g_ctrl);
  
  int msm_vidc_s_ext_ctrl(void *instance, struct v4l2_ext_controls *control)
  {
  	struct msm_vidc_inst *inst = instance;
  	if (!inst || !control)
  		return -EINVAL;
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_s_ext_ctrl(instance, control);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_s_ext_ctrl);
  
  int msm_vidc_reqbufs(void *instance, struct v4l2_requestbuffers *b)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !b)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_reqbufs(instance, b);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_reqbufs(instance, b);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_reqbufs);
  
  struct buffer_info *get_registered_buf(struct msm_vidc_inst *inst,
  		struct v4l2_buffer *b, int idx, int *plane)
  {
  	struct buffer_info *temp;
  	struct buffer_info *ret = NULL;
  	int i;
  	int fd = b->m.planes[idx].reserved[0];
  	u32 buff_off = b->m.planes[idx].reserved[1];
  	u32 size = b->m.planes[idx].length;
  	ion_phys_addr_t device_addr = b->m.planes[idx].m.userptr;
  
  	if (fd < 0 || !plane) {
  		dprintk(VIDC_ERR, "Invalid input\n");
  		goto err_invalid_input;
  	}
  
  	WARN(!mutex_is_locked(&inst->registeredbufs.lock),
  		"Registered buf lock is not acquired for %s", __func__);
  
  	*plane = 0;
  	list_for_each_entry(temp, &inst->registeredbufs.list, list) {
  		for (i = 0; (i < temp->num_planes)
  			&& (i < VIDEO_MAX_PLANES); i++) {
  			bool ion_hndl_matches = temp->handle[i] ?
  						msm_smem_compare_buffers(inst->mem_client, fd,
  						temp->handle[i]->smem_priv) : false;
  			if (temp &&
  				(device_addr == temp->device_addr[i] || ion_hndl_matches) &&
  				(CONTAINS(temp->buff_off[i],
  				temp->size[i], buff_off)
  				|| CONTAINS(buff_off,
  				size, temp->buff_off[i])
  				|| OVERLAPS(buff_off, size,
  				temp->buff_off[i],
  				temp->size[i]))) {
  					dprintk(VIDC_DBG,
  						"This memory region is already mapped\n");
  					ret = temp;
  					*plane = i;
  					break;
  			}
  		}
  		if (ret)
  			break;
  	}
  err_invalid_input:
  	return ret;
  }
  
  static struct msm_smem *get_same_fd_buffer(struct msm_vidc_list *buf_list,
  							int fd)
  {
  	struct buffer_info *temp;
  	struct msm_smem *same_fd_handle = NULL;
  
  	int i;
  
  	if (fd == 0)
  		return NULL;
  
  	if (!buf_list || fd < 0) {
  		dprintk(VIDC_ERR, "Invalid input\n");
  		goto err_invalid_input;
  	}
  
  	mutex_lock(&buf_list->lock);
  	list_for_each_entry(temp, &buf_list->list, list) {
  		for (i = 0; (i < temp->num_planes)
  			&& (i < VIDEO_MAX_PLANES); i++) {
  			if (temp && (temp->fd[i] == fd) &&
  				temp->handle[i] && temp->mapped[i])  {
  				temp->same_fd_ref[i]++;
  				dprintk(VIDC_INFO,
  				"Found same fd buffer\n");
  				same_fd_handle = temp->handle[i];
  				break;
  			}
  		}
  		if (same_fd_handle)
  			break;
  	}
  	mutex_unlock(&buf_list->lock);
  
  err_invalid_input:
  	return same_fd_handle;
  }
  
  struct buffer_info *device_to_uvaddr(struct msm_vidc_list *buf_list,
  				ion_phys_addr_t device_addr)
  {
  	struct buffer_info *temp = NULL;
  	int found = 0;
  	int i;
  
  	if (!buf_list || !device_addr) {
  		dprintk(VIDC_ERR,
  			"Invalid input- device_addr: 0x%pa buf_list: %pK\n",
  			&device_addr, buf_list);
  		goto err_invalid_input;
  	}
  
  	mutex_lock(&buf_list->lock);
  	list_for_each_entry(temp, &buf_list->list, list) {
  		for (i = 0; (i < temp->num_planes)
  			&& (i < VIDEO_MAX_PLANES); i++) {
  			if (temp && !temp->inactive &&
  				temp->device_addr[i] == device_addr)  {
  				dprintk(VIDC_INFO,
  				"Found same fd buffer\n");
  				found = 1;
  				break;
  			}
  		}
  		if (found)
  			break;
  	}
  	mutex_unlock(&buf_list->lock);
  
  err_invalid_input:
  	return temp;
  }
  
  static inline void populate_buf_info(struct buffer_info *binfo,
  			struct v4l2_buffer *b, u32 i)
  {
          if (i < VIDEO_MAX_PLANES) {
  		binfo->type = b->type;
  		binfo->fd[i] = b->m.planes[i].reserved[0];
  		binfo->buff_off[i] = b->m.planes[i].reserved[1];
  		binfo->size[i] = b->m.planes[i].length;
  		binfo->uvaddr[i] = b->m.planes[i].m.userptr;
  		binfo->num_planes = b->length;
  		binfo->memory = b->memory;
  		binfo->v4l2_index = b->index;
  		binfo->timestamp.tv_sec = b->timestamp.tv_sec;
  		binfo->timestamp.tv_usec = b->timestamp.tv_usec;
  		dprintk(VIDC_DBG, "%s: fd[%d] = %d b->index = %d",
  			__func__, i, binfo->fd[0], b->index);
          } else {
  		dprintk(VIDC_ERR,
                          "Invalid plane number");
          }
  }
  
  static inline void repopulate_v4l2_buffer(struct v4l2_buffer *b,
  					struct buffer_info *binfo)
  {
  	int i = 0;
  	b->type = binfo->type;
  	b->length = binfo->num_planes;
  	b->memory = binfo->memory;
  	b->index = binfo->v4l2_index;
  	b->timestamp.tv_sec = binfo->timestamp.tv_sec;
  	b->timestamp.tv_usec = binfo->timestamp.tv_usec;
  	binfo->dequeued = false;
  	for (i = 0; i < binfo->num_planes; ++i) {
  		b->m.planes[i].reserved[0] = binfo->fd[i];
  		b->m.planes[i].reserved[1] = binfo->buff_off[i];
  		b->m.planes[i].length = binfo->size[i];
  		b->m.planes[i].m.userptr = binfo->device_addr[i];
  		dprintk(VIDC_DBG, "%s %d %d %d 0x%pa\n", __func__, binfo->fd[i],
  				binfo->buff_off[i], binfo->size[i],
  				&binfo->device_addr[i]);
  	}
  }
  
  static struct msm_smem *map_buffer(struct msm_vidc_inst *inst,
  		struct v4l2_plane *p, enum hal_buffer buffer_type)
  {
  	struct msm_smem *handle = NULL;
  	handle = msm_comm_smem_user_to_kernel(inst,
  				p->reserved[0],
  				p->reserved[1],
  				buffer_type);
  	if (!handle) {
  		dprintk(VIDC_ERR,
  			"%s: Failed to get device buffer address\n", __func__);
  		return NULL;
  	}
  	if (msm_comm_smem_cache_operations(inst, handle,
  			SMEM_CACHE_CLEAN))
  		dprintk(VIDC_WARN,
  			"CACHE Clean failed: %d, %d, %d\n",
  				p->reserved[0],
  				p->reserved[1],
  				p->length);
  	return handle;
  }
  
  static inline enum hal_buffer get_hal_buffer_type(
  		struct msm_vidc_inst *inst, struct v4l2_buffer *b)
  {
  	if (inst->session_type == MSM_VIDC_DECODER) {
  		if (b->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
  			return HAL_BUFFER_INPUT;
  		else /* V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE */
  			return HAL_BUFFER_OUTPUT;
  	} else {
  		/* FIXME in the future.  See comment in msm_comm_get_\
  		 * domain_partition. Same problem here. */
  		if (b->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
  			return HAL_BUFFER_OUTPUT;
  		else /* V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE */
  			return HAL_BUFFER_INPUT;
  	}
  	return -EINVAL;
  }
  
  static inline bool is_dynamic_output_buffer_mode(struct v4l2_buffer *b,
  				struct msm_vidc_inst *inst)
  {
  	return ((b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
  		(inst->buffer_mode_set[CAPTURE_PORT] ==
  		HAL_BUFFER_MODE_DYNAMIC));
  }
  
  
  static inline void save_v4l2_buffer(struct v4l2_buffer *b,
  						struct buffer_info *binfo)
  {
  	int i = 0;
  	for (i = 0; i < b->length; ++i) {
  		if (EXTRADATA_IDX(b->length) &&
  			(i == EXTRADATA_IDX(b->length)) &&
  			!b->m.planes[i].length) {
  			continue;
  		}
  		populate_buf_info(binfo, b, i);
  	}
  }
  
  int map_and_register_buf(struct msm_vidc_inst *inst, struct v4l2_buffer *b)
  {
  	struct buffer_info *binfo = NULL;
  	struct buffer_info *temp = NULL, *iterator = NULL;
  	int plane = 0;
  	int i = 0, rc = 0;
  	struct msm_smem *same_fd_handle = NULL;
  	bool check_same_fd_handle;
  
  	if (!b || !inst) {
  		dprintk(VIDC_ERR, "%s: invalid input\n", __func__);
  		return -EINVAL;
  	}
  
  	check_same_fd_handle = !is_dynamic_output_buffer_mode(b, inst) &&
  		!( inst->session_type == MSM_VIDC_ENCODER &&
  			b->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
  
  	binfo = kzalloc(sizeof(*binfo), GFP_KERNEL);
  	if (!binfo) {
  		dprintk(VIDC_ERR, "Out of memory\n");
  		rc = -ENOMEM;
  		goto exit;
  	}
  	if (b->length > VIDEO_MAX_PLANES) {
  		dprintk(VIDC_ERR, "Num planes exceeds max: %d, %d\n",
  			b->length, VIDEO_MAX_PLANES);
  		rc = -EINVAL;
  		goto exit;
  	}
  
  	dprintk(VIDC_DBG, "[MAP] Create binfo = %pK fd = %d type = %d\n",
  			binfo, b->m.planes[0].reserved[0], b->type);
  
  	for (i = 0; i < b->length; ++i) {
  		if (EXTRADATA_IDX(b->length) &&
  			(i == EXTRADATA_IDX(b->length)) &&
  			!b->m.planes[i].length) {
  			continue;
  		}
  		mutex_lock(&inst->registeredbufs.lock);
  		temp = get_registered_buf(inst, b, i, &plane);
  		if (temp && !is_dynamic_output_buffer_mode(b, inst)) {
  			dprintk(VIDC_DBG,
  				"This memory region has already been prepared\n");
  			rc = -EINVAL;
  		}
  
  		if (temp && is_dynamic_output_buffer_mode(b, inst) &&
  			(i == 0)) {
  			/*
  			* Buffer is already present in registered list
  			* increment ref_count, populate new values of v4l2
  			* buffer in existing buffer_info struct.
  			*
  			* We will use the saved buffer info and queue it when
  			* we receive RELEASE_BUFFER_REFERENCE EVENT from f/w.
  			*/
  			dprintk(VIDC_DBG, "[MAP] Buffer already prepared\n");
  			list_for_each_entry(iterator,
  				&inst->registeredbufs.list, list) {
  				if (iterator == temp) {
  					rc = buf_ref_get(inst, temp);
  					if (rc > 0) {
  						save_v4l2_buffer(b, temp);
  						rc = -EEXIST;
  					}
  					break;
  				}
  			}
  		}
  		mutex_unlock(&inst->registeredbufs.lock);
  		if (rc < 0)
  			goto exit;
  
  		//if (!is_dynamic_output_buffer_mode(b, inst))
  		if (check_same_fd_handle)
  			same_fd_handle = get_same_fd_buffer(
  						&inst->registeredbufs,
  						b->m.planes[i].reserved[0]);
  
  		populate_buf_info(binfo, b, i);
  		if (same_fd_handle) {
  			binfo->device_addr[i] =
  			same_fd_handle->device_addr + binfo->buff_off[i];
  			b->m.planes[i].m.userptr = binfo->device_addr[i];
  			binfo->mapped[i] = false;
  			binfo->handle[i] = same_fd_handle;
  		} else {
  			if (inst->map_output_buffer) {
  				binfo->handle[i] =
  					map_buffer(inst, &b->m.planes[i],
  						get_hal_buffer_type(inst, b));
  				if (!binfo->handle[i]) {
  					rc = -EINVAL;
  					goto exit;
  				}
  				binfo->mapped[i] = true;
  				binfo->device_addr[i] =
  					binfo->handle[i]->device_addr +
  					binfo->buff_off[i];
  				b->m.planes[i].m.userptr =
  					binfo->device_addr[i];
  			} else {
  				binfo->device_addr[i] =
  					b->m.planes[i].m.userptr;
  			}
  		}
  		/* We maintain one ref count for all planes*/
  		if ((i == 0) && is_dynamic_output_buffer_mode(b, inst)) {
  			rc = buf_ref_get(inst, binfo);
  			if (rc < 0)
  				goto exit;
  		}
  		dprintk(VIDC_DBG,
  			"%s: [MAP] binfo = %pK, handle[%d] = %pK, device_addr = 0x%pa, fd = %d, offset = %d, mapped = %d\n",
  			__func__, binfo, i, binfo->handle[i],
  			&binfo->device_addr[i], binfo->fd[i],
  			binfo->buff_off[i], binfo->mapped[i]);
  	}
  
  	mutex_lock(&inst->registeredbufs.lock);
  	list_add_tail(&binfo->list, &inst->registeredbufs.list);
  	mutex_unlock(&inst->registeredbufs.lock);
  	return 0;
  
  exit:
  	kfree(binfo);
  	return rc;
  }
  int unmap_and_deregister_buf(struct msm_vidc_inst *inst,
  			struct buffer_info *binfo)
  {
  	int i = 0;
  	struct buffer_info *temp = NULL;
  	bool found = false, keep_node = false;
  
  	if (!inst || !binfo) {
  		dprintk(VIDC_ERR, "%s invalid param: %pK %pK\n",
  			__func__, inst, binfo);
  		return -EINVAL;
  	}
  
  	WARN(!mutex_is_locked(&inst->registeredbufs.lock),
  		"Registered buf lock is not acquired for %s", __func__);
  
  	/*
  	* Make sure the buffer to be unmapped and deleted
  	* from the registered list is present in the list.
  	*/
  	list_for_each_entry(temp, &inst->registeredbufs.list, list) {
  		if (temp == binfo) {
  			found = true;
  			break;
  		}
  	}
  
  	/*
  	* Free the buffer info only if
  	* - buffer info has not been deleted from registered list
  	* - vidc client has called dqbuf on the buffer
  	* - no references are held on the buffer
  	*/
  	if (!found || !temp || !temp->pending_deletion || !temp->dequeued)
  		goto exit;
  
  	for (i = 0; i < temp->num_planes; i++) {
  		dprintk(VIDC_DBG,
  			"%s: [UNMAP] binfo = %pK, handle[%d] = %pK, device_addr = 0x%pa, fd = %d, offset = %d, mapped = %d\n",
  			__func__, temp, i, temp->handle[i],
  			&temp->device_addr[i], temp->fd[i],
  			temp->buff_off[i], temp->mapped[i]);
  		/*
  		* Unmap the handle only if the buffer has been mapped and no
  		* other buffer has a reference to this buffer.
  		* In case of buffers with same fd, we will map the buffer only
  		* once and subsequent buffers will refer to the mapped buffer's
  		* device address.
  		* For buffers which share the same fd, do not unmap and keep
  		* the buffer info in registered list.
  		*/
  		if (temp->handle[i] && temp->mapped[i] &&
  			!temp->same_fd_ref[i]) {
  			msm_comm_smem_free(inst,
  				temp->handle[i]);
  		}
  
  		if (temp->same_fd_ref[i])
  			keep_node = true;
  		else {
  			temp->fd[i] = 0;
  			temp->handle[i] = 0;
  			temp->device_addr[i] = 0;
  			temp->uvaddr[i] = 0;
  		}
  	}
  	if (!keep_node) {
  		dprintk(VIDC_DBG, "[UNMAP] AND-FREED binfo: %pK\n", temp);
  		list_del(&temp->list);
  		kfree(temp);
  	} else {
  		temp->inactive = true;
  		dprintk(VIDC_DBG, "[UNMAP] NOT-FREED binfo: %pK\n", temp);
  	}
  exit:
  	return 0;
  }
  
  
  int qbuf_dynamic_buf(struct msm_vidc_inst *inst,
  			struct buffer_info *binfo)
  {
  	struct v4l2_buffer b = {0};
  	struct v4l2_plane plane[VIDEO_MAX_PLANES] = { {0} };
  
  	if (!binfo) {
  		dprintk(VIDC_ERR, "%s invalid param: %pK\n", __func__, binfo);
  		return -EINVAL;
  	}
  	dprintk(VIDC_DBG, "%s fd[0] = %d\n", __func__, binfo->fd[0]);
  
  	b.m.planes = plane;
  	repopulate_v4l2_buffer(&b, binfo);
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_qbuf(inst, &b);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_qbuf(inst, &b);
  
  	return -EINVAL;
  }
  
  int output_buffer_cache_invalidate(struct msm_vidc_inst *inst,
  				struct buffer_info *binfo)
  {
  	int i = 0;
  	int rc = 0;
  
  	if (!inst) {
  		dprintk(VIDC_ERR, "%s: invalid inst: %pK\n", __func__, inst);
  		return -EINVAL;
  	}
  
  	if (!inst->map_output_buffer)
  		return 0;
  
  	if (!binfo) {
  		dprintk(VIDC_ERR, "%s: invalid buffer info: %pK\n",
  			__func__, inst);
  		return -EINVAL;
  	}
  
  	if (binfo->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
  		return 0;
  
  
  	for (i = 0; i < binfo->num_planes; i++) {
  		if (binfo->handle[i]) {
  			rc = msm_comm_smem_cache_operations(inst,
  				binfo->handle[i], SMEM_CACHE_INVALIDATE);
  			if (rc) {
  				dprintk(VIDC_ERR,
  					"%s: Failed to clean caches: %d\n",
  					__func__, rc);
  				return -EINVAL;
  			}
  		} else
  			dprintk(VIDC_DBG, "%s: NULL handle for plane %d\n",
  					__func__, i);
  	}
  	return 0;
  }
  
  static bool valid_v4l2_buffer(struct v4l2_buffer *b,
  		struct msm_vidc_inst *inst) {
  	enum vidc_ports port =
  		!V4L2_TYPE_IS_MULTIPLANAR(b->type) ? MAX_PORT_NUM :
  		b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ? CAPTURE_PORT :
  		b->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE ? OUTPUT_PORT :
  								MAX_PORT_NUM;
  
  	return port != MAX_PORT_NUM &&
  		inst->fmts[port]->num_planes == b->length;
  }
  
  int msm_vidc_prepare_buf(void *instance, struct v4l2_buffer *b)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !b || !valid_v4l2_buffer(b, inst))
  		return -EINVAL;
  
  	if (is_dynamic_output_buffer_mode(b, inst))
  		return 0;
  
  	/* Map the buffer only for non-kernel clients*/
  	if (b->m.planes[0].reserved[0]) {
  		inst->map_output_buffer = true;
  		if (map_and_register_buf(inst, b))
  			return -EINVAL;
  	}
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_prepare_buf(instance, b);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_prepare_buf(instance, b);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_prepare_buf);
  
  int msm_vidc_release_buffers(void *instance, int buffer_type)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct buffer_info *bi, *dummy;
  	struct v4l2_buffer buffer_info;
  	struct v4l2_plane plane[VIDEO_MAX_PLANES];
  	int i, rc = 0;
  
  	if (!inst)
  		return -EINVAL;
  
  	if (!inst->in_reconfig) {
  		rc = msm_comm_try_state(inst, MSM_VIDC_RELEASE_RESOURCES_DONE);
  		if (rc) {
  			dprintk(VIDC_ERR,
  					"Failed to move inst: %pK to release res done\n",
  					inst);
  		}
  	}
  
  	/*
  	* In dynamic buffer mode, driver needs to release resources,
  	* but not call release buffers on firmware, as the buffers
  	* were never registered with firmware.
  	*/
  	if ((buffer_type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
  		(inst->buffer_mode_set[CAPTURE_PORT] ==
  				HAL_BUFFER_MODE_DYNAMIC)) {
  		goto free_and_unmap;
  	}
  
  	mutex_lock(&inst->registeredbufs.lock);
  	list_for_each_entry(bi, &inst->registeredbufs.list, list) {
  		bool release_buf = false;
  		if (bi->type == buffer_type) {
  			buffer_info.type = bi->type;
  			for (i = 0; (i < bi->num_planes)
  				&& (i < VIDEO_MAX_PLANES); i++) {
  				plane[i].reserved[0] = bi->fd[i];
  				plane[i].reserved[1] = bi->buff_off[i];
  				plane[i].length = bi->size[i];
  				plane[i].m.userptr = bi->device_addr[i];
  				buffer_info.m.planes = plane;
  				dprintk(VIDC_DBG,
  					"Releasing buffer: %d, %d, %d\n",
  					buffer_info.m.planes[i].reserved[0],
  					buffer_info.m.planes[i].reserved[1],
  					buffer_info.m.planes[i].length);
  			}
  			buffer_info.length = bi->num_planes;
  			release_buf = true;
  		}
  
  		if (!release_buf)
  			continue;
  		if (inst->session_type == MSM_VIDC_DECODER)
  			rc = msm_vdec_release_buf(instance,
  				&buffer_info);
  		if (inst->session_type == MSM_VIDC_ENCODER)
  			rc = msm_venc_release_buf(instance,
  				&buffer_info);
  		if (rc)
  			dprintk(VIDC_ERR,
  				"Failed Release buffer: %d, %d, %d\n",
  				buffer_info.m.planes[0].reserved[0],
  				buffer_info.m.planes[0].reserved[1],
  				buffer_info.m.planes[0].length);
  	}
  	mutex_unlock(&inst->registeredbufs.lock);
  
  free_and_unmap:
  	mutex_lock(&inst->registeredbufs.lock);
  	list_for_each_entry_safe(bi, dummy, &inst->registeredbufs.list, list) {
  		if (bi->type == buffer_type) {
  			list_del(&bi->list);
  			for (i = 0; i < bi->num_planes; i++) {
  				if (bi->handle[i] && bi->mapped[i]) {
  					dprintk(VIDC_DBG,
  						"%s: [UNMAP] binfo = 0x%pK, handle[%d] = %pK, device_addr = 0x%pa, fd = %d, offset = %d, mapped = %d\n",
  						__func__, bi, i, bi->handle[i],
  						&bi->device_addr[i], bi->fd[i],
  						bi->buff_off[i], bi->mapped[i]);
  					msm_comm_smem_free(inst,
  							bi->handle[i]);
  				}
  			}
  			kfree(bi);
  		}
  	}
  	mutex_unlock(&inst->registeredbufs.lock);
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_release_buffers);
  
  int msm_vidc_encoder_cmd(void *instance, struct v4l2_encoder_cmd *enc)
  {
  	struct msm_vidc_inst *inst = instance;
  	if (!inst || !inst->core || !enc) {
  		dprintk(VIDC_ERR, "%s invalid params\n", __func__);
  		return -EINVAL;
  	}
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_cmd(instance, enc);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_encoder_cmd);
  
  int msm_vidc_decoder_cmd(void *instance, struct v4l2_decoder_cmd *dec)
  {
  	struct msm_vidc_inst *inst = instance;
  	if (!inst || !inst->core || !dec) {
  		dprintk(VIDC_ERR, "%s invalid params\n", __func__);
  		return -EINVAL;
  	}
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_cmd(instance, dec);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_decoder_cmd);
  
  int msm_vidc_qbuf(void *instance, struct v4l2_buffer *b)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct buffer_info *binfo;
  	int plane = 0;
  	int rc = 0;
  	int i;
  
  	if (!inst || !b || !valid_v4l2_buffer(b, inst))
  		return -EINVAL;
  
  	if (is_dynamic_output_buffer_mode(b, inst)) {
  		if (b->m.planes[0].reserved[0])
  			inst->map_output_buffer = true;
  
  		rc = map_and_register_buf(inst, b);
  		if (rc == -EEXIST)
  			return 0;
  		if (rc)
  			return rc;
  	}
  
  	for (i = 0; i < b->length; ++i) {
  		if (!inst->map_output_buffer)
  			continue;
  		if (EXTRADATA_IDX(b->length) &&
  			(i == EXTRADATA_IDX(b->length)) &&
  			!b->m.planes[i].length) {
  			b->m.planes[i].m.userptr = 0;
  			continue;
  		}
  		mutex_lock(&inst->registeredbufs.lock);
  		binfo = get_registered_buf(inst, b, i, &plane);
  		mutex_unlock(&inst->registeredbufs.lock);
  		if (!binfo) {
  			dprintk(VIDC_ERR,
  				"This buffer is not registered: %d, %d, %d\n",
  				b->m.planes[i].reserved[0],
  				b->m.planes[i].reserved[1],
  				b->m.planes[i].length);
  			goto err_invalid_buff;
  		}
  		b->m.planes[i].m.userptr = binfo->device_addr[i];
  		dprintk(VIDC_DBG, "Queueing device address = 0x%pa\n",
  				&binfo->device_addr[i]);
  
  		if ((inst->fmts[OUTPUT_PORT]->fourcc ==
  			V4L2_PIX_FMT_HEVC_HYBRID) &&  binfo->handle[i] &&
  			(b->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
  			rc = msm_comm_smem_cache_operations(inst,
  				binfo->handle[i], SMEM_CACHE_INVALIDATE);
  			if (rc) {
  				dprintk(VIDC_ERR,
  					"Failed to inv caches: %d\n", rc);
  				goto err_invalid_buff;
  			}
  		}
  
  		if (binfo->handle[i] &&
  			(b->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) {
  			rc = msm_comm_smem_cache_operations(inst,
  					binfo->handle[i], SMEM_CACHE_CLEAN);
  			if (rc) {
  				dprintk(VIDC_ERR,
  					"Failed to clean caches: %d\n", rc);
  				goto err_invalid_buff;
  			}
  		}
  	}
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_qbuf(instance, b);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_qbuf(instance, b);
  
  err_invalid_buff:
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_qbuf);
  
  int msm_vidc_dqbuf(void *instance, struct v4l2_buffer *b)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct buffer_info *buffer_info = NULL;
  	int i = 0, rc = 0;
  
  	if (!inst || !b || !valid_v4l2_buffer(b, inst))
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		rc = msm_vdec_dqbuf(instance, b);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		rc = msm_venc_dqbuf(instance, b);
  
  	if (rc)
  		return rc;
  
  	for (i = 0; i < b->length; i++) {
  		if (!inst->map_output_buffer)
  			continue;
  		if (EXTRADATA_IDX(b->length) &&
  			(i == EXTRADATA_IDX(b->length)) &&
  			!b->m.planes[i].m.userptr) {
  			continue;
  		}
  		buffer_info = device_to_uvaddr(&inst->registeredbufs,
  			b->m.planes[i].m.userptr);
  
  		if (!buffer_info) {
  			dprintk(VIDC_ERR,
  				"%s no buffer info registered for buffer addr: 0x%lx\n",
  				__func__, b->m.planes[i].m.userptr);
  			return -EINVAL;
  		}
  
  		b->m.planes[i].m.userptr = buffer_info->uvaddr[i];
  		if (!b->m.planes[i].m.userptr) {
  			dprintk(VIDC_ERR,
  			"%s: Failed to find user virtual address, 0x%lx, %d, %d\n",
  			__func__, b->m.planes[i].m.userptr, b->type, i);
  			return -EINVAL;
  		}
  	}
  
  	if (!buffer_info && inst->map_output_buffer) {
  		dprintk(VIDC_ERR,
  			"%s: error - no buffer info found in registered list\n",
  			__func__);
  		return -EINVAL;
  	}
  
  	if (is_dynamic_output_buffer_mode(b, inst)) {
  		if (!buffer_info)
  			return -EINVAL;
  
  		buffer_info->dequeued = true;
  
  		dprintk(VIDC_DBG, "[DEQUEUED]: fd[0] = %d\n",
  			buffer_info->fd[0]);
  		mutex_lock(&inst->registeredbufs.lock);
  		rc = unmap_and_deregister_buf(inst, buffer_info);
  		mutex_unlock(&inst->registeredbufs.lock);
  	} else
  		rc = output_buffer_cache_invalidate(inst, buffer_info);
  
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_dqbuf);
  
  int msm_vidc_streamon(void *instance, enum v4l2_buf_type i)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_streamon(instance, i);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_streamon(instance, i);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_streamon);
  
  int msm_vidc_streamoff(void *instance, enum v4l2_buf_type i)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst)
  		return -EINVAL;
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		return msm_vdec_streamoff(instance, i);
  	if (inst->session_type == MSM_VIDC_ENCODER)
  		return msm_venc_streamoff(instance, i);
  	return -EINVAL;
  }
  EXPORT_SYMBOL(msm_vidc_streamoff);
  
  int msm_vidc_enum_framesizes(void *instance, struct v4l2_frmsizeenum *fsize)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct msm_vidc_core_capability *capability = NULL;
  
  	if (!inst || !fsize) {
  		dprintk(VIDC_ERR, "%s: invalid parameter: %pK %pK\n",
  				__func__, inst, fsize);
  		return -EINVAL;
  	}
  	if (!inst->core)
  		return -EINVAL;
  
  	capability = &inst->capability;
  	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
  	fsize->stepwise.min_width = capability->width.min;
  	fsize->stepwise.max_width = capability->width.max;
  	fsize->stepwise.step_width = capability->width.step_size;
  	fsize->stepwise.min_height = capability->height.min;
  	fsize->stepwise.max_height = capability->height.max;
  	fsize->stepwise.step_height = capability->height.step_size;
  	return 0;
  }
  EXPORT_SYMBOL(msm_vidc_enum_framesizes);
  
  struct msm_smem *msm_vidc_smem_alloc(void *instance,
  			size_t size, u32 align, u32 flags,
  			enum hal_buffer buffer_type, int map_kernel)
  {
  	return msm_comm_smem_alloc((struct msm_vidc_inst *)instance,
  			size, align, flags, buffer_type, map_kernel);
  
  }
  EXPORT_SYMBOL(msm_vidc_smem_alloc);
  
  void msm_vidc_smem_free(void *instance, struct msm_smem *mem)
  {
  	msm_comm_smem_free((struct msm_vidc_inst *)instance, mem);
  }
  EXPORT_SYMBOL(msm_vidc_smem_free);
  
  int msm_vidc_smem_cache_operations(void *instance, struct msm_smem *mem,
  		enum smem_cache_ops cache_ops)
  {
  	return msm_comm_smem_cache_operations(
  		(struct msm_vidc_inst *)instance, mem, cache_ops);
  }
  EXPORT_SYMBOL(msm_vidc_smem_cache_operations);
  
  struct msm_smem *msm_vidc_smem_user_to_kernel(void *instance, int fd,
  			u32 offset, enum hal_buffer buffer_type)
  {
  	return msm_comm_smem_user_to_kernel(
  			(struct msm_vidc_inst *)instance,
  			fd, offset, buffer_type);
  }
  EXPORT_SYMBOL(msm_vidc_smem_user_to_kernel);
  
  int msm_vidc_smem_get_domain_partition(void *instance, u32 flags,
  		enum hal_buffer buffer_type, int *domain_num,
  		int *partition_num)
  {
  	return msm_comm_smem_get_domain_partition(
  		(struct msm_vidc_inst *)instance,
  		flags, buffer_type, domain_num, partition_num);
  }
  EXPORT_SYMBOL(msm_vidc_smem_get_domain_partition);
  
  void *msm_vidc_smem_get_client(void *instance)
  {
  	struct msm_vidc_inst *inst = instance;
  
  	if (!inst || !inst->mem_client) {
  		dprintk(VIDC_ERR, "%s: invalid instance or client = %pK\n",
  				__func__, inst);
  		return NULL;
  	}
  
  	return inst->mem_client;
  }
  EXPORT_SYMBOL(msm_vidc_smem_get_client);
  
  static void *vidc_get_userptr(void *alloc_ctx, unsigned long vaddr,
  				unsigned long size, int write)
  {
  	return (void *)0xdeadbeef;
  }
  
  static void vidc_put_userptr(void *buf_priv)
  {
  }
  
  static const struct vb2_mem_ops msm_vidc_vb2_mem_ops = {
  	.get_userptr = vidc_get_userptr,
  	.put_userptr = vidc_put_userptr,
  };
  
  static inline int vb2_bufq_init(struct msm_vidc_inst *inst,
  		enum v4l2_buf_type type, enum session_type sess)
  {
  	struct vb2_queue *q = NULL;
  	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
  		q = &inst->bufq[CAPTURE_PORT].vb2_bufq;
  	} else if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
  		q = &inst->bufq[OUTPUT_PORT].vb2_bufq;
  	} else {
  		dprintk(VIDC_ERR, "buf_type = %d not recognised\n", type);
  		return -EINVAL;
  	}
  
  	q->type = type;
  	q->io_modes = VB2_MMAP | VB2_USERPTR;
  	q->io_flags = 0;
  	q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
  
  	if (sess == MSM_VIDC_DECODER)
  		q->ops = msm_vdec_get_vb2q_ops();
  	else if (sess == MSM_VIDC_ENCODER)
  		q->ops = msm_venc_get_vb2q_ops();
  	q->mem_ops = &msm_vidc_vb2_mem_ops;
  	q->drv_priv = inst;
  	return vb2_queue_init(q);
  }
  
  static int setup_event_queue(void *inst,
  				struct video_device *pvdev)
  {
  	int rc = 0;
  	struct msm_vidc_inst *vidc_inst = (struct msm_vidc_inst *)inst;
  
  	if (!inst || !pvdev) {
  		dprintk(VIDC_ERR, "%s Invalid params inst %pK pvdev %pK\n",
  					__func__, inst, pvdev);
  		return -EINVAL;
  	}
  
  	v4l2_fh_init(&vidc_inst->event_handler, pvdev);
  	v4l2_fh_add(&vidc_inst->event_handler);
  
  	return rc;
  }
  
  int msm_vidc_subscribe_event(void *inst, const struct v4l2_event_subscription *sub)
  {
  	int rc = 0;
  	struct msm_vidc_inst *vidc_inst = (struct msm_vidc_inst *)inst;
  
  	if (!inst || !sub)
  		return -EINVAL;
  
  	rc = v4l2_event_subscribe(&vidc_inst->event_handler, sub, MAX_EVENTS, NULL);
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_subscribe_event);
  
  int msm_vidc_unsubscribe_event(void *inst, const struct v4l2_event_subscription *sub)
  {
  	int rc = 0;
  	struct msm_vidc_inst *vidc_inst = (struct msm_vidc_inst *)inst;
  
  	if (!inst || !sub)
  		return -EINVAL;
  
  	rc = v4l2_event_unsubscribe(&vidc_inst->event_handler, sub);
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_unsubscribe_event);
  
  int msm_vidc_dqevent(void *inst, struct v4l2_event *event)
  {
  	int rc = 0;
  	struct msm_vidc_inst *vidc_inst = (struct msm_vidc_inst *)inst;
  
  	if (!inst || !event)
  		return -EINVAL;
  
  	rc = v4l2_event_dequeue(&vidc_inst->event_handler, event, false);
  	return rc;
  }
  EXPORT_SYMBOL(msm_vidc_dqevent);
  
  void *msm_vidc_open(int core_id, int session_type)
  {
  	struct msm_vidc_inst *inst = NULL;
  	struct msm_vidc_core *core = NULL;
  	int rc = 0;
  	int i = 0;
  	if (core_id >= MSM_VIDC_CORES_MAX ||
  			session_type >= MSM_VIDC_MAX_DEVICES) {
  		dprintk(VIDC_ERR, "Invalid input, core_id = %d, session = %d\n",
  			core_id, session_type);
  		goto err_invalid_core;
  	}
  	core = get_vidc_core(core_id);
  	if (!core) {
  		dprintk(VIDC_ERR,
  			"Failed to find core for core_id = %d\n", core_id);
  		goto err_invalid_core;
  	}
  
  	inst = kzalloc(sizeof(*inst), GFP_KERNEL);
  	if (!inst) {
  		dprintk(VIDC_ERR, "Failed to allocate memory\n");
  		rc = -ENOMEM;
  		goto err_invalid_core;
  	}
  
  	pr_info(VIDC_DBG_TAG "Opening video instance: %pK, %d\n",
  		VIDC_MSG_PRIO2STRING(VIDC_INFO), inst, session_type);
  	mutex_init(&inst->sync_lock);
  	mutex_init(&inst->bufq[CAPTURE_PORT].lock);
  	mutex_init(&inst->bufq[OUTPUT_PORT].lock);
  	mutex_init(&inst->lock);
  
  	INIT_MSM_VIDC_LIST(&inst->pendingq);
  	INIT_MSM_VIDC_LIST(&inst->internalbufs);
  	INIT_MSM_VIDC_LIST(&inst->persistbufs);
  	INIT_MSM_VIDC_LIST(&inst->pending_getpropq);
  	INIT_MSM_VIDC_LIST(&inst->outputbufs);
  	INIT_MSM_VIDC_LIST(&inst->registeredbufs);
  
  	inst->session_type = session_type;
  	init_waitqueue_head(&inst->kernel_event_queue);
  	inst->state = MSM_VIDC_CORE_UNINIT_DONE;
  	inst->core = core;
  	inst->map_output_buffer = false;
  
  	for (i = SESSION_MSG_INDEX(SESSION_MSG_START);
  		i <= SESSION_MSG_INDEX(SESSION_MSG_END); i++) {
  		init_completion(&inst->completions[i]);
  	}
  	inst->mem_client = msm_smem_new_client(SMEM_ION,
  					&inst->core->resources);
  	if (!inst->mem_client) {
  		dprintk(VIDC_ERR, "Failed to create memory client\n");
  		goto fail_mem_client;
  	}
  	if (session_type == MSM_VIDC_DECODER) {
  		msm_vdec_inst_init(inst);
  		msm_vdec_ctrl_init(inst);
  	} else if (session_type == MSM_VIDC_ENCODER) {
  		msm_venc_inst_init(inst);
  		msm_venc_ctrl_init(inst);
  	}
  	msm_comm_init_dcvs(inst);
  	rc = vb2_bufq_init(inst, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
  			session_type);
  	if (rc) {
  		dprintk(VIDC_ERR,
  			"Failed to initialize vb2 queue on capture port\n");
  		goto fail_bufq_capture;
  	}
  	rc = vb2_bufq_init(inst, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
  			session_type);
  	if (rc) {
  		dprintk(VIDC_ERR,
  			"Failed to initialize vb2 queue on capture port\n");
  		goto fail_bufq_output;
  	}
  
  	mutex_lock(&core->lock);
  	list_add_tail(&inst->list, &core->instances);
  	mutex_unlock(&core->lock);
  
  	rc = msm_comm_try_state(inst, MSM_VIDC_CORE_INIT);
  	if (rc) {
  		dprintk(VIDC_ERR,
  			"Failed to move video instance to init state\n");
  		goto fail_init;
  	}
  	inst->debugfs_root =
  		msm_vidc_debugfs_init_inst(inst, core->debugfs_root);
  
  	rc = setup_event_queue(inst, &core->vdev[session_type].vdev);
  	if (rc) {
  		dprintk(VIDC_ERR,
  			"%s Failed to set up event queue\n", __func__);
  		goto fail_setup;
  	}
  
  	return inst;
  
  fail_setup:
  	debugfs_remove_recursive(inst->debugfs_root);
  
  fail_init:
  	vb2_queue_release(&inst->bufq[OUTPUT_PORT].vb2_bufq);
  
  	mutex_lock(&core->lock);
  	list_del(&inst->list);
  	mutex_unlock(&core->lock);
  
  fail_bufq_output:
  	vb2_queue_release(&inst->bufq[CAPTURE_PORT].vb2_bufq);
  fail_bufq_capture:
  	if (session_type == MSM_VIDC_DECODER)
  		msm_vdec_ctrl_deinit(inst);
  	else if (session_type == MSM_VIDC_ENCODER)
  		msm_venc_ctrl_deinit(inst);
  	msm_smem_delete_client(inst->mem_client);
  fail_mem_client:
  	kfree(inst);
  	inst = NULL;
  err_invalid_core:
  	return inst;
  }
  EXPORT_SYMBOL(msm_vidc_open);
  
  static void cleanup_instance(struct msm_vidc_inst *inst)
  {
  	struct vb2_buf_entry *entry, *dummy;
  	if (inst) {
  
  		mutex_lock(&inst->pendingq.lock);
  		list_for_each_entry_safe(entry, dummy, &inst->pendingq.list,
  				list) {
  			list_del(&entry->list);
  			kfree(entry);
  		}
  		mutex_unlock(&inst->pendingq.lock);
  
  		if (msm_comm_release_scratch_buffers(inst, false)) {
  			dprintk(VIDC_ERR,
  				"Failed to release scratch buffers\n");
  		}
  
  		if (msm_comm_release_persist_buffers(inst)) {
  			dprintk(VIDC_ERR,
  				"Failed to release persist buffers\n");
  		}
  
  		if (msm_comm_release_output_buffers(inst)) {
  			dprintk(VIDC_ERR,
  				"Failed to release output buffers\n");
  		}
  
  		if (inst->extradata_handle)
  			msm_comm_smem_free(inst, inst->extradata_handle);
  
  		debugfs_remove_recursive(inst->debugfs_root);
  		mutex_lock(&inst->pending_getpropq.lock);
  		WARN_ON(!list_empty(&inst->pending_getpropq.list)
  			&& (msm_vidc_debug & VIDC_INFO));
  		mutex_unlock(&inst->pending_getpropq.lock);
  	}
  }
  
  int msm_vidc_close(void *instance)
  {
  	struct msm_vidc_inst *inst = instance;
  	struct msm_vidc_inst *temp, *inst_dummy;
  	struct msm_vidc_core *core;
  	struct buffer_info *bi, *dummy;
  	int rc = 0;
  	int i;
  
  	if (!inst || !inst->core)
  		return -EINVAL;
  
  	v4l2_fh_del(&inst->event_handler);
  
  	mutex_lock(&inst->registeredbufs.lock);
  	list_for_each_entry_safe(bi, dummy, &inst->registeredbufs.list, list) {
  		if (bi->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
  			list_del(&bi->list);
  			for (i = 0; (i < bi->num_planes)
  				&& (i < VIDEO_MAX_PLANES); i++) {
  				if (bi->handle[i])
  					msm_comm_smem_free(inst, bi->handle[i]);
  			}
  			kfree(bi);
  		}
  	}
  	mutex_unlock(&inst->registeredbufs.lock);
  
  	core = inst->core;
  
  	mutex_lock(&core->lock);
  	list_for_each_entry_safe(temp, inst_dummy, &core->instances, list) {
  		if (temp == inst)
  			list_del(&inst->list);
  	}
  	mutex_unlock(&core->lock);
  
  	if (inst->session_type == MSM_VIDC_DECODER)
  		msm_vdec_ctrl_deinit(inst);
  	else if (inst->session_type == MSM_VIDC_ENCODER)
  		msm_venc_ctrl_deinit(inst);
  
  	for (i = 0; i < MAX_PORT_NUM; i++)
  		vb2_queue_release(&inst->bufq[i].vb2_bufq);
  
  	cleanup_instance(inst);
  	if (inst->state != MSM_VIDC_CORE_INVALID &&
  		core->state != VIDC_CORE_INVALID)
  		rc = msm_comm_try_state(inst, MSM_VIDC_CORE_UNINIT);
  	else
  		rc = msm_comm_force_cleanup(inst);
  	if (rc)
  		dprintk(VIDC_ERR,
  			"Failed to move video instance to uninit state\n");
  
  	msm_comm_session_clean(inst);
  
  	msm_smem_delete_client(inst->mem_client);
  
  	pr_info(VIDC_DBG_TAG "Closed video instance: %pK\n",
  			VIDC_MSG_PRIO2STRING(VIDC_INFO), inst);
  	kfree(inst);
  
  	return 0;
  }
  EXPORT_SYMBOL(msm_vidc_close);
  
  int msm_vidc_suspend(int core_id)
  {
  	return msm_comm_suspend(core_id);
  }
  EXPORT_SYMBOL(msm_vidc_suspend);
  
  