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-rw-r--r--drivers/media/v4l2-core/v4l2-mem2mem.c126
-rw-r--r--include/media/v4l2-fh.h4
-rw-r--r--include/media/v4l2-mem2mem.h24
3 files changed, 154 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 73035ee0f4de..178ce96556c6 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -558,6 +558,8 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
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);
if (list_empty(&src_q->done_list))
poll_wait(file, &src_q->done_wq, wait);
@@ -566,6 +568,8 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
if (m2m_ctx->m2m_dev->m2m_ops->lock)
m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv);
+ else if (m2m_ctx->q_lock)
+ mutex_lock(m2m_ctx->q_lock);
spin_lock_irqsave(&src_q->done_lock, flags);
if (!list_empty(&src_q->done_list))
@@ -693,6 +697,13 @@ struct v4l2_m2m_ctx *v4l2_m2m_ctx_init(struct v4l2_m2m_dev *m2m_dev,
if (ret)
goto err;
+ /*
+ * If both queues use same mutex assign it as the common buffer
+ * queues lock to the m2m context. This lock is used in the
+ * v4l2_m2m_ioctl_* helpers.
+ */
+ if (out_q_ctx->q.lock == cap_q_ctx->q.lock)
+ m2m_ctx->q_lock = out_q_ctx->q.lock;
return m2m_ctx;
err:
@@ -740,3 +751,118 @@ void v4l2_m2m_buf_queue(struct v4l2_m2m_ctx *m2m_ctx, struct vb2_buffer *vb)
}
EXPORT_SYMBOL_GPL(v4l2_m2m_buf_queue);
+/* Videobuf2 ioctl helpers */
+
+int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_reqbufs(file, fh->m2m_ctx, rb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_reqbufs);
+
+int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv,
+ struct v4l2_create_buffers *create)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_create_bufs(file, fh->m2m_ctx, create);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs);
+
+int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_querybuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_querybuf);
+
+int v4l2_m2m_ioctl_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_qbuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_qbuf);
+
+int v4l2_m2m_ioctl_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_dqbuf(file, fh->m2m_ctx, buf);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_dqbuf);
+
+int v4l2_m2m_ioctl_expbuf(struct file *file, void *priv,
+ struct v4l2_exportbuffer *eb)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_expbuf(file, fh->m2m_ctx, eb);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_expbuf);
+
+int v4l2_m2m_ioctl_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_streamon(file, fh->m2m_ctx, type);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamon);
+
+int v4l2_m2m_ioctl_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct v4l2_fh *fh = file->private_data;
+
+ return v4l2_m2m_streamoff(file, fh->m2m_ctx, type);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_streamoff);
+
+/*
+ * v4l2_file_operations helpers. It is assumed here same lock is used
+ * for the output and the capture buffer queue.
+ */
+
+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;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_fop_mmap);
+
+unsigned int v4l2_m2m_fop_poll(struct file *file, poll_table *wait)
+{
+ struct v4l2_fh *fh = file->private_data;
+ struct v4l2_m2m_ctx *m2m_ctx = fh->m2m_ctx;
+ unsigned int ret;
+
+ if (m2m_ctx->q_lock)
+ mutex_lock(m2m_ctx->q_lock);
+
+ ret = v4l2_m2m_poll(file, m2m_ctx, wait);
+
+ if (m2m_ctx->q_lock)
+ mutex_unlock(m2m_ctx->q_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_fop_poll);
+
diff --git a/include/media/v4l2-fh.h b/include/media/v4l2-fh.h
index 528cdaf622e1..803516775162 100644
--- a/include/media/v4l2-fh.h
+++ b/include/media/v4l2-fh.h
@@ -45,6 +45,10 @@ struct v4l2_fh {
struct list_head available; /* Dequeueable event */
unsigned int navailable;
u32 sequence;
+
+#if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
+ struct v4l2_m2m_ctx *m2m_ctx;
+#endif
};
/*
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index 44542a20ab81..12ea5a6a4331 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -64,6 +64,9 @@ struct v4l2_m2m_queue_ctx {
};
struct v4l2_m2m_ctx {
+ /* optional cap/out vb2 queues lock */
+ struct mutex *q_lock;
+
/* private: internal use only */
struct v4l2_m2m_dev *m2m_dev;
@@ -229,5 +232,26 @@ static inline void *v4l2_m2m_dst_buf_remove(struct v4l2_m2m_ctx *m2m_ctx)
return v4l2_m2m_buf_remove(&m2m_ctx->cap_q_ctx);
}
+/* v4l2 ioctl helpers */
+
+int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb);
+int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh,
+ struct v4l2_create_buffers *create);
+int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf);
+int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh,
+ struct v4l2_exportbuffer *eb);
+int v4l2_m2m_ioctl_qbuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf);
+int v4l2_m2m_ioctl_dqbuf(struct file *file, void *fh,
+ struct v4l2_buffer *buf);
+int v4l2_m2m_ioctl_streamon(struct file *file, void *fh,
+ enum v4l2_buf_type type);
+int v4l2_m2m_ioctl_streamoff(struct file *file, void *fh,
+ enum v4l2_buf_type type);
+int v4l2_m2m_fop_mmap(struct file *file, struct vm_area_struct *vma);
+unsigned int v4l2_m2m_fop_poll(struct file *file, poll_table *wait);
+
#endif /* _MEDIA_V4L2_MEM2MEM_H */
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-24 20:26:39 +0300