diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/media/v4l2-core/v4l2-mem2mem.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/media/v4l2-core/v4l2-mem2mem.c')
-rw-r--r-- | kernel/drivers/media/v4l2-core/v4l2-mem2mem.c | 86 |
1 files changed, 57 insertions, 29 deletions
diff --git a/kernel/drivers/media/v4l2-core/v4l2-mem2mem.c b/kernel/drivers/media/v4l2-core/v4l2-mem2mem.c index 73824a5ad..61d56c940 100644 --- a/kernel/drivers/media/v4l2-core/v4l2-mem2mem.c +++ b/kernel/drivers/media/v4l2-core/v4l2-mem2mem.c @@ -17,7 +17,7 @@ #include <linux/sched.h> #include <linux/slab.h> -#include <media/videobuf2-core.h> +#include <media/videobuf2-v4l2.h> #include <media/v4l2-mem2mem.h> #include <media/v4l2-dev.h> #include <media/v4l2-fh.h> @@ -357,9 +357,16 @@ int v4l2_m2m_reqbufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, struct v4l2_requestbuffers *reqbufs) { struct vb2_queue *vq; + int ret; vq = v4l2_m2m_get_vq(m2m_ctx, reqbufs->type); - return vb2_reqbufs(vq, reqbufs); + ret = vb2_reqbufs(vq, reqbufs); + /* If count == 0, then the owner has released all buffers and he + is no longer owner of the queue. Otherwise we have an owner. */ + if (ret == 0) + vq->owner = reqbufs->count ? file->private_data : NULL; + + return ret; } EXPORT_SYMBOL_GPL(v4l2_m2m_reqbufs); @@ -427,6 +434,25 @@ int v4l2_m2m_dqbuf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, EXPORT_SYMBOL_GPL(v4l2_m2m_dqbuf); /** + * v4l2_m2m_prepare_buf() - prepare a source or destination buffer, depending on + * the type + */ +int v4l2_m2m_prepare_buf(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_prepare_buf(vq, buf); + if (!ret) + v4l2_m2m_try_schedule(m2m_ctx); + + return ret; +} +EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf); + +/** * v4l2_m2m_create_bufs() - create a source or destination buffer, depending * on the type */ @@ -557,24 +583,25 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, goto end; } - if (m2m_ctx->m2m_dev->m2m_ops->unlock) - m2m_ctx->m2m_dev->m2m_ops->unlock(m2m_ctx->priv); - else if (m2m_ctx->q_lock) - mutex_unlock(m2m_ctx->q_lock); - + spin_lock_irqsave(&src_q->done_lock, flags); if (list_empty(&src_q->done_list)) poll_wait(file, &src_q->done_wq, wait); - if (list_empty(&dst_q->done_list)) - poll_wait(file, &dst_q->done_wq, wait); + spin_unlock_irqrestore(&src_q->done_lock, flags); - if (m2m_ctx->m2m_dev->m2m_ops->lock) - m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv); - else if (m2m_ctx->q_lock) { - if (mutex_lock_interruptible(m2m_ctx->q_lock)) { - rc |= POLLERR; - goto end; + spin_lock_irqsave(&dst_q->done_lock, flags); + if (list_empty(&dst_q->done_list)) { + /* + * If the last buffer was dequeued from the capture queue, + * return immediately. DQBUF will return -EPIPE. + */ + if (dst_q->last_buffer_dequeued) { + spin_unlock_irqrestore(&dst_q->done_lock, flags); + return rc | POLLIN | POLLRDNORM; } + + poll_wait(file, &dst_q->done_wq, wait); } + spin_unlock_irqrestore(&dst_q->done_lock, flags); spin_lock_irqsave(&src_q->done_lock, flags); if (!list_empty(&src_q->done_list)) @@ -739,13 +766,15 @@ EXPORT_SYMBOL_GPL(v4l2_m2m_ctx_release); * * Call from buf_queue(), videobuf_queue_ops callback. */ -void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb) +void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, + struct vb2_v4l2_buffer *vbuf) { - struct v4l2_m2m_buffer *b = container_of(vb, struct v4l2_m2m_buffer, vb); + struct v4l2_m2m_buffer *b = container_of(vbuf, + 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); + q_ctx = get_queue_ctx(m2m_ctx, vbuf->vb2_buf.vb2_queue->type); if (!q_ctx) return; @@ -803,6 +832,15 @@ int v4l2_m2m_ioctl_dqbuf(struct file *file, void *priv, } EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_dqbuf); +int v4l2_m2m_ioctl_prepare_buf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct v4l2_fh *fh = file->private_data; + + return v4l2_m2m_prepare_buf(file, fh->m2m_ctx, buf); +} +EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_prepare_buf); + int v4l2_m2m_ioctl_expbuf(struct file *file, void *priv, struct v4l2_exportbuffer *eb) { @@ -838,18 +876,8 @@ EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamoff); int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma) { struct v4l2_fh *fh = file->private_data; - struct v4l2_m2m_ctx *m2m_ctx = fh->m2m_ctx; - int ret; - - if (m2m_ctx->q_lock && mutex_lock_interruptible(m2m_ctx->q_lock)) - return -ERESTARTSYS; - - ret = v4l2_m2m_mmap(file, m2m_ctx, vma); - if (m2m_ctx->q_lock) - mutex_unlock(m2m_ctx->q_lock); - - return ret; + return v4l2_m2m_mmap(file, fh->m2m_ctx, vma); } EXPORT_SYMBOL_GPL(v4l2_m2m_fop_mmap); |