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path: root/drivers/media/video/v4l2-mem2mem.c
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Diffstat (limited to 'drivers/media/video/v4l2-mem2mem.c')
-rw-r--r--drivers/media/video/v4l2-mem2mem.c647
1 files changed, 0 insertions, 647 deletions
diff --git a/drivers/media/video/v4l2-mem2mem.c b/drivers/media/video/v4l2-mem2mem.c
deleted file mode 100644
index 97b4831..0000000
--- a/drivers/media/video/v4l2-mem2mem.c
+++ /dev/null
@@ -1,647 +0,0 @@
-/*
- * Memory-to-memory device framework for Video for Linux 2 and videobuf.
- *
- * Helper functions for devices that use videobuf buffers for both their
- * source and destination.
- *
- * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
- * Pawel Osciak, <pawel@osciak.com>
- * Marek Szyprowski, <m.szyprowski@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-
-#include <media/videobuf2-core.h>
-#include <media/v4l2-mem2mem.h>
-#include <media/v4l2-dev.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-event.h>
-
-MODULE_DESCRIPTION("Mem to mem device framework for videobuf");
-MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
-MODULE_LICENSE("GPL");
-
-static bool debug;
-module_param(debug, bool, 0644);
-
-#define dprintk(fmt, arg...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG "%s: " fmt, __func__, ## arg);\
- } while (0)
-
-
-/* Instance is already queued on the job_queue */
-#define TRANS_QUEUED (1 << 0)
-/* Instance is currently running in hardware */
-#define TRANS_RUNNING (1 << 1)
-
-
-/* Offset base for buffers on the destination queue - used to distinguish
- * between source and destination buffers when mmapping - they receive the same
- * offsets but for different queues */
-#define DST_QUEUE_OFF_BASE (1 << 30)
-
-
-/**
- * struct v4l2_m2m_dev - per-device context
- * @curr_ctx: currently running instance
- * @job_queue: instances queued to run
- * @job_spinlock: protects job_queue
- * @m2m_ops: driver callbacks
- */
-struct v4l2_m2m_dev {
- struct v4l2_m2m_ctx *curr_ctx;
-
- struct list_head job_queue;
- spinlock_t job_spinlock;
-
- struct v4l2_m2m_ops *m2m_ops;
-};
-
-static struct v4l2_m2m_queue_ctx *get_queue_ctx(struct v4l2_m2m_ctx *m2m_ctx,
- enum v4l2_buf_type type)
-{
- if (V4L2_TYPE_IS_OUTPUT(type))
- return &m2m_ctx->out_q_ctx;
- else
- return &m2m_ctx->cap_q_ctx;
-}
-
-/**
- * v4l2_m2m_get_vq() - return vb2_queue for the given type
- */
-struct vb2_queue *v4l2_m2m_get_vq(struct v4l2_m2m_ctx *m2m_ctx,
- enum v4l2_buf_type type)
-{
- struct v4l2_m2m_queue_ctx *q_ctx;
-
- q_ctx = get_queue_ctx(m2m_ctx, type);
- if (!q_ctx)
- return NULL;
-
- return &q_ctx->q;
-}
-EXPORT_SYMBOL(v4l2_m2m_get_vq);
-
-/**
- * v4l2_m2m_next_buf() - return next buffer from the list of ready buffers
- */
-void *v4l2_m2m_next_buf(struct v4l2_m2m_queue_ctx *q_ctx)
-{
- struct v4l2_m2m_buffer *b = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
-
- if (list_empty(&q_ctx->rdy_queue)) {
- spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
- return NULL;
- }
-
- b = list_entry(q_ctx->rdy_queue.next, struct v4l2_m2m_buffer, list);
- spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
- return &b->vb;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_next_buf);
-
-/**
- * v4l2_m2m_buf_remove() - take off a buffer from the list of ready buffers and
- * return it
- */
-void *v4l2_m2m_buf_remove(struct v4l2_m2m_queue_ctx *q_ctx)
-{
- struct v4l2_m2m_buffer *b = NULL;
- unsigned long flags;
-
- spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
- if (list_empty(&q_ctx->rdy_queue)) {
- spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
- return NULL;
- }
- b = list_entry(q_ctx->rdy_queue.next, struct v4l2_m2m_buffer, list);
- list_del(&b->list);
- q_ctx->num_rdy--;
- spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
-
- return &b->vb;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_buf_remove);
-
-/*
- * Scheduling handlers
- */
-
-/**
- * v4l2_m2m_get_curr_priv() - return driver private data for the currently
- * running instance or NULL if no instance is running
- */
-void *v4l2_m2m_get_curr_priv(struct v4l2_m2m_dev *m2m_dev)
-{
- unsigned long flags;
- void *ret = NULL;
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
- if (m2m_dev->curr_ctx)
- ret = m2m_dev->curr_ctx->priv;
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(v4l2_m2m_get_curr_priv);
-
-/**
- * v4l2_m2m_try_run() - select next job to perform and run it if possible
- *
- * Get next transaction (if present) from the waiting jobs list and run it.
- */
-static void v4l2_m2m_try_run(struct v4l2_m2m_dev *m2m_dev)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
- if (NULL != m2m_dev->curr_ctx) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- dprintk("Another instance is running, won't run now\n");
- return;
- }
-
- if (list_empty(&m2m_dev->job_queue)) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- dprintk("No job pending\n");
- return;
- }
-
- m2m_dev->curr_ctx = list_entry(m2m_dev->job_queue.next,
- struct v4l2_m2m_ctx, queue);
- m2m_dev->curr_ctx->job_flags |= TRANS_RUNNING;
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
-
- m2m_dev->m2m_ops->device_run(m2m_dev->curr_ctx->priv);
-}
-
-/**
- * v4l2_m2m_try_schedule() - check whether an instance is ready to be added to
- * the pending job queue and add it if so.
- * @m2m_ctx: m2m context assigned to the instance to be checked
- *
- * There are three basic requirements an instance has to meet to be able to run:
- * 1) at least one source buffer has to be queued,
- * 2) at least one destination buffer has to be queued,
- * 3) streaming has to be on.
- *
- * There may also be additional, custom requirements. In such case the driver
- * should supply a custom callback (job_ready in v4l2_m2m_ops) that should
- * return 1 if the instance is ready.
- * An example of the above could be an instance that requires more than one
- * src/dst buffer per transaction.
- */
-static void v4l2_m2m_try_schedule(struct v4l2_m2m_ctx *m2m_ctx)
-{
- struct v4l2_m2m_dev *m2m_dev;
- unsigned long flags_job, flags;
-
- m2m_dev = m2m_ctx->m2m_dev;
- dprintk("Trying to schedule a job for m2m_ctx: %p\n", m2m_ctx);
-
- if (!m2m_ctx->out_q_ctx.q.streaming
- || !m2m_ctx->cap_q_ctx.q.streaming) {
- dprintk("Streaming needs to be on for both queues\n");
- return;
- }
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
- if (m2m_ctx->job_flags & TRANS_QUEUED) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
- dprintk("On job queue already\n");
- return;
- }
-
- spin_lock_irqsave(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
- if (list_empty(&m2m_ctx->out_q_ctx.rdy_queue)) {
- spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
- dprintk("No input buffers available\n");
- return;
- }
- if (list_empty(&m2m_ctx->cap_q_ctx.rdy_queue)) {
- spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
- dprintk("No output buffers available\n");
- return;
- }
- spin_unlock_irqrestore(&m2m_ctx->out_q_ctx.rdy_spinlock, flags);
-
- if (m2m_dev->m2m_ops->job_ready
- && (!m2m_dev->m2m_ops->job_ready(m2m_ctx->priv))) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
- dprintk("Driver not ready\n");
- return;
- }
-
- list_add_tail(&m2m_ctx->queue, &m2m_dev->job_queue);
- m2m_ctx->job_flags |= TRANS_QUEUED;
-
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags_job);
-
- v4l2_m2m_try_run(m2m_dev);
-}
-
-/**
- * v4l2_m2m_job_finish() - inform the framework that a job has been finished
- * and have it clean up
- *
- * Called by a driver to yield back the device after it has finished with it.
- * Should be called as soon as possible after reaching a state which allows
- * other instances to take control of the device.
- *
- * This function has to be called only after device_run() callback has been
- * called on the driver. To prevent recursion, it should not be called directly
- * from the device_run() callback though.
- */
-void v4l2_m2m_job_finish(struct v4l2_m2m_dev *m2m_dev,
- struct v4l2_m2m_ctx *m2m_ctx)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
- if (!m2m_dev->curr_ctx || m2m_dev->curr_ctx != m2m_ctx) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- dprintk("Called by an instance not currently running\n");
- return;
- }
-
- list_del(&m2m_dev->curr_ctx->queue);
- m2m_dev->curr_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING);
- wake_up(&m2m_dev->curr_ctx->finished);
- m2m_dev->curr_ctx = NULL;
-
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
-
- /* This instance might have more buffers ready, but since we do not
- * allow more than one job on the job_queue per instance, each has
- * to be scheduled separately after the previous one finishes. */
- v4l2_m2m_try_schedule(m2m_ctx);
- v4l2_m2m_try_run(m2m_dev);
-}
-EXPORT_SYMBOL(v4l2_m2m_job_finish);
-
-/**
- * v4l2_m2m_reqbufs() - multi-queue-aware REQBUFS multiplexer
- */
-int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct v4l2_requestbuffers *reqbufs)
-{
- struct vb2_queue *vq;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type);
- return vb2_reqbufs(vq, reqbufs);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs);
-
-/**
- * v4l2_m2m_querybuf() - multi-queue-aware QUERYBUF multiplexer
- *
- * See v4l2_m2m_mmap() documentation for details.
- */
-int v4l2_m2m_querybuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct v4l2_buffer *buf)
-{
- struct vb2_queue *vq;
- int ret = 0;
- unsigned int i;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
- ret = vb2_querybuf(vq, buf);
-
- /* Adjust MMAP memory offsets for the CAPTURE queue */
- if (buf->memory == V4L2_MEMORY_MMAP && !V4L2_TYPE_IS_OUTPUT(vq->type)) {
- if (V4L2_TYPE_IS_MULTIPLANAR(vq->type)) {
- for (i = 0; i < buf->length; ++i)
- buf->m.planes[i].m.mem_offset
- += DST_QUEUE_OFF_BASE;
- } else {
- buf->m.offset += DST_QUEUE_OFF_BASE;
- }
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_querybuf);
-
-/**
- * v4l2_m2m_qbuf() - enqueue a source or destination buffer, depending on
- * the type
- */
-int v4l2_m2m_qbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct v4l2_buffer *buf)
-{
- struct vb2_queue *vq;
- int ret;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
- ret = vb2_qbuf(vq, buf);
- if (!ret)
- v4l2_m2m_try_schedule(m2m_ctx);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_qbuf);
-
-/**
- * v4l2_m2m_dqbuf() - dequeue a source or destination buffer, depending on
- * the type
- */
-int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct v4l2_buffer *buf)
-{
- struct vb2_queue *vq;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, buf->type);
- return vb2_dqbuf(vq, buf, file->f_flags & O_NONBLOCK);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf);
-
-/**
- * v4l2_m2m_streamon() - turn on streaming for a video queue
- */
-int v4l2_m2m_streamon(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- enum v4l2_buf_type type)
-{
- struct vb2_queue *vq;
- int ret;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, type);
- ret = vb2_streamon(vq, type);
- if (!ret)
- v4l2_m2m_try_schedule(m2m_ctx);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_streamon);
-
-/**
- * v4l2_m2m_streamoff() - turn off streaming for a video queue
- */
-int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- enum v4l2_buf_type type)
-{
- struct vb2_queue *vq;
-
- vq = v4l2_m2m_get_vq(m2m_ctx, type);
- return vb2_streamoff(vq, type);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_streamoff);
-
-/**
- * v4l2_m2m_poll() - poll replacement, for destination buffers only
- *
- * Call from the driver's poll() function. Will poll both queues. If a buffer
- * is available to dequeue (with dqbuf) from the source queue, this will
- * indicate that a non-blocking write can be performed, while read will be
- * returned in case of the destination queue.
- */
-unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct poll_table_struct *wait)
-{
- struct video_device *vfd = video_devdata(file);
- unsigned long req_events = poll_requested_events(wait);
- struct vb2_queue *src_q, *dst_q;
- struct vb2_buffer *src_vb = NULL, *dst_vb = NULL;
- unsigned int rc = 0;
- unsigned long flags;
-
- if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
- struct v4l2_fh *fh = file->private_data;
-
- 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;
- }
-
- src_q = v4l2_m2m_get_src_vq(m2m_ctx);
- dst_q = v4l2_m2m_get_dst_vq(m2m_ctx);
-
- /*
- * There has to be at least one buffer queued on each queued_list, which
- * means either in driver already or waiting for driver to claim it
- * and start processing.
- */
- if ((!src_q->streaming || list_empty(&src_q->queued_list))
- && (!dst_q->streaming || list_empty(&dst_q->queued_list))) {
- rc |= POLLERR;
- goto end;
- }
-
- if (m2m_ctx->m2m_dev->m2m_ops->unlock)
- m2m_ctx->m2m_dev->m2m_ops->unlock(m2m_ctx->priv);
-
- poll_wait(file, &src_q->done_wq, wait);
- poll_wait(file, &dst_q->done_wq, wait);
-
- if (m2m_ctx->m2m_dev->m2m_ops->lock)
- m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv);
-
- spin_lock_irqsave(&src_q->done_lock, flags);
- if (!list_empty(&src_q->done_list))
- src_vb = list_first_entry(&src_q->done_list, struct vb2_buffer,
- done_entry);
- if (src_vb && (src_vb->state == VB2_BUF_STATE_DONE
- || src_vb->state == VB2_BUF_STATE_ERROR))
- rc |= POLLOUT | POLLWRNORM;
- spin_unlock_irqrestore(&src_q->done_lock, flags);
-
- spin_lock_irqsave(&dst_q->done_lock, flags);
- if (!list_empty(&dst_q->done_list))
- dst_vb = list_first_entry(&dst_q->done_list, struct vb2_buffer,
- done_entry);
- if (dst_vb && (dst_vb->state == VB2_BUF_STATE_DONE
- || dst_vb->state == VB2_BUF_STATE_ERROR))
- rc |= POLLIN | POLLRDNORM;
- spin_unlock_irqrestore(&dst_q->done_lock, flags);
-
-end:
- return rc;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_poll);
-
-/**
- * v4l2_m2m_mmap() - source and destination queues-aware mmap multiplexer
- *
- * Call from driver's mmap() function. Will handle mmap() for both queues
- * seamlessly for videobuffer, which will receive normal per-queue offsets and
- * proper videobuf queue pointers. The differentiation is made outside videobuf
- * by adding a predefined offset to buffers from one of the queues and
- * subtracting it before passing it back to videobuf. Only drivers (and
- * thus applications) receive modified offsets.
- */
-int v4l2_m2m_mmap(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
- struct vm_area_struct *vma)
-{
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- struct vb2_queue *vq;
-
- if (offset < DST_QUEUE_OFF_BASE) {
- vq = v4l2_m2m_get_src_vq(m2m_ctx);
- } else {
- vq = v4l2_m2m_get_dst_vq(m2m_ctx);
- vma->vm_pgoff -= (DST_QUEUE_OFF_BASE >> PAGE_SHIFT);
- }
-
- return vb2_mmap(vq, vma);
-}
-EXPORT_SYMBOL(v4l2_m2m_mmap);
-
-/**
- * v4l2_m2m_init() - initialize per-driver m2m data
- *
- * Usually called from driver's probe() function.
- */
-struct v4l2_m2m_dev *v4l2_m2m_init(struct v4l2_m2m_ops *m2m_ops)
-{
- struct v4l2_m2m_dev *m2m_dev;
-
- if (!m2m_ops)
- return ERR_PTR(-EINVAL);
-
- BUG_ON(!m2m_ops->device_run);
- BUG_ON(!m2m_ops->job_abort);
-
- m2m_dev = kzalloc(sizeof *m2m_dev, GFP_KERNEL);
- if (!m2m_dev)
- return ERR_PTR(-ENOMEM);
-
- m2m_dev->curr_ctx = NULL;
- m2m_dev->m2m_ops = m2m_ops;
- INIT_LIST_HEAD(&m2m_dev->job_queue);
- spin_lock_init(&m2m_dev->job_spinlock);
-
- return m2m_dev;
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_init);
-
-/**
- * v4l2_m2m_release() - cleans up and frees a m2m_dev structure
- *
- * Usually called from driver's remove() function.
- */
-void v4l2_m2m_release(struct v4l2_m2m_dev *m2m_dev)
-{
- kfree(m2m_dev);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_release);
-
-/**
- * v4l2_m2m_ctx_init() - allocate and initialize a m2m context
- * @priv - driver's instance private data
- * @m2m_dev - a previously initialized m2m_dev struct
- * @vq_init - a callback for queue type-specific initialization function to be
- * used for initializing videobuf_queues
- *
- * Usually called from driver's open() function.
- */
-struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev,
- void *drv_priv,
- int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq))
-{
- struct v4l2_m2m_ctx *m2m_ctx;
- struct v4l2_m2m_queue_ctx *out_q_ctx, *cap_q_ctx;
- int ret;
-
- m2m_ctx = kzalloc(sizeof *m2m_ctx, GFP_KERNEL);
- if (!m2m_ctx)
- return ERR_PTR(-ENOMEM);
-
- m2m_ctx->priv = drv_priv;
- m2m_ctx->m2m_dev = m2m_dev;
- init_waitqueue_head(&m2m_ctx->finished);
-
- out_q_ctx = &m2m_ctx->out_q_ctx;
- cap_q_ctx = &m2m_ctx->cap_q_ctx;
-
- INIT_LIST_HEAD(&out_q_ctx->rdy_queue);
- INIT_LIST_HEAD(&cap_q_ctx->rdy_queue);
- spin_lock_init(&out_q_ctx->rdy_spinlock);
- spin_lock_init(&cap_q_ctx->rdy_spinlock);
-
- INIT_LIST_HEAD(&m2m_ctx->queue);
-
- ret = queue_init(drv_priv, &out_q_ctx->q, &cap_q_ctx->q);
-
- if (ret)
- goto err;
-
- return m2m_ctx;
-err:
- kfree(m2m_ctx);
- return ERR_PTR(ret);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_init);
-
-/**
- * v4l2_m2m_ctx_release() - release m2m context
- *
- * Usually called from driver's release() function.
- */
-void v4l2_m2m_ctx_release(struct v4l2_m2m_ctx *m2m_ctx)
-{
- struct v4l2_m2m_dev *m2m_dev;
- unsigned long flags;
-
- m2m_dev = m2m_ctx->m2m_dev;
-
- spin_lock_irqsave(&m2m_dev->job_spinlock, flags);
- if (m2m_ctx->job_flags & TRANS_RUNNING) {
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- m2m_dev->m2m_ops->job_abort(m2m_ctx->priv);
- dprintk("m2m_ctx %p running, will wait to complete", m2m_ctx);
- wait_event(m2m_ctx->finished, !(m2m_ctx->job_flags & TRANS_RUNNING));
- } else if (m2m_ctx->job_flags & TRANS_QUEUED) {
- list_del(&m2m_ctx->queue);
- m2m_ctx->job_flags &= ~(TRANS_QUEUED | TRANS_RUNNING);
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- dprintk("m2m_ctx: %p had been on queue and was removed\n",
- m2m_ctx);
- } else {
- /* Do nothing, was not on queue/running */
- spin_unlock_irqrestore(&m2m_dev->job_spinlock, flags);
- }
-
- vb2_queue_release(&m2m_ctx->cap_q_ctx.q);
- vb2_queue_release(&m2m_ctx->out_q_ctx.q);
-
- kfree(m2m_ctx);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release);
-
-/**
- * v4l2_m2m_buf_queue() - add a buffer to the proper ready buffers list.
- *
- * Call from buf_queue(), videobuf_queue_ops callback.
- */
-void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb)
-{
- struct v4l2_m2m_buffer *b = container_of(vb, struct v4l2_m2m_buffer, vb);
- struct v4l2_m2m_queue_ctx *q_ctx;
- unsigned long flags;
-
- q_ctx = get_queue_ctx(m2m_ctx, vb->vb2_queue->type);
- if (!q_ctx)
- return;
-
- spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);
- list_add_tail(&b->list, &q_ctx->rdy_queue);
- q_ctx->num_rdy++;
- spin_unlock_irqrestore(&q_ctx->rdy_spinlock, flags);
-}
-EXPORT_SYMBOL_GPL(v4l2_m2m_buf_queue);
-
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