Merging upstream version 6.8.9.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 43 insertions, 18 deletions

diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 4b6a9d2ea..bec8c3a1e 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -72,6 +72,10 @@ struct vb2_buffer;
  *		 argument to other ops in this structure.
  * @put_userptr: inform the allocator that a USERPTR buffer will no longer
  *		 be used.
+ * @prepare:	called every time the buffer is passed from userspace to the
+ *		driver, useful for cache synchronisation, optional.
+ * @finish:	called every time the buffer is passed back from the driver
+ *		to the userspace, also optional.
  * @attach_dmabuf: attach a shared &struct dma_buf for a hardware operation;
  *		   used for DMABUF memory types; dev is the alloc device
  *		   dbuf is the shared dma_buf; returns ERR_PTR() on failure;
@@ -86,10 +90,6 @@ struct vb2_buffer;
  *		dmabuf.
  * @unmap_dmabuf: releases access control to the dmabuf - allocator is notified
  *		  that this driver is done using the dmabuf for now.
- * @prepare:	called every time the buffer is passed from userspace to the
- *		driver, useful for cache synchronisation, optional.
- * @finish:	called every time the buffer is passed back from the driver
- *		to the userspace, also optional.
  * @vaddr:	return a kernel virtual address to a given memory buffer
  *		associated with the passed private structure or NULL if no
  *		such mapping exists.
@@ -402,7 +402,7 @@ struct vb2_buffer {
  *			by calling vb2_buffer_done() with %VB2_BUF_STATE_QUEUED.
  *			If you need a minimum number of buffers before you can
  *			start streaming, then set
- *			&vb2_queue->min_buffers_needed. If that is non-zero
+ *			&vb2_queue->min_queued_buffers. If that is non-zero
  *			then @start_streaming won't be called until at least
  *			that many buffers have been queued up by userspace.
  * @stop_streaming:	called when 'streaming' state must be disabled; driver
@@ -484,7 +484,6 @@ struct vb2_buf_ops {
  *		caller. For example, for V4L2, it should match
  *		the types defined on &enum v4l2_buf_type.
  * @io_modes:	supported io methods (see &enum vb2_io_modes).
- * @alloc_devs:	&struct device memory type/allocator-specific per-plane device
  * @dev:	device to use for the default allocation context if the driver
  *		doesn't fill in the @alloc_devs array.
  * @dma_attrs:	DMA attributes to use for the DMA.
@@ -546,10 +545,14 @@ struct vb2_buf_ops {
  * @gfp_flags:	additional gfp flags used when allocating the buffers.
  *		Typically this is 0, but it may be e.g. %GFP_DMA or %__GFP_DMA32
  *		to force the buffer allocation to a specific memory zone.
- * @min_buffers_needed: the minimum number of buffers needed before
+ * @min_queued_buffers: the minimum number of queued buffers needed before
  *		@start_streaming can be called. Used when a DMA engine
  *		cannot be started unless at least this number of buffers
  *		have been queued into the driver.
+ *		VIDIOC_REQBUFS will ensure at least @min_queued_buffers
+ *		buffers will be allocated. Note that VIDIOC_CREATE_BUFS will not
+ *		modify the requested buffer count.
+ * @alloc_devs:	&struct device memory type/allocator-specific per-plane device
  */
 /*
  * Private elements (won't appear at the uAPI book):
@@ -558,6 +561,9 @@ struct vb2_buf_ops {
  * @dma_dir:	DMA mapping direction.
  * @bufs:	videobuf2 buffer structures
  * @num_buffers: number of allocated/used buffers
+ * @max_num_buffers: upper limit of number of allocated/used buffers.
+ *		     If set to 0 v4l2 core will change it VB2_MAX_FRAME
+ *		     for backward compatibility.
  * @queued_list: list of buffers currently queued from userspace
  * @queued_count: number of buffers queued and ready for streaming.
  * @owned_by_drv_count: number of buffers owned by the driver
@@ -571,6 +577,9 @@ struct vb2_buf_ops {
  * @waiting_for_buffers: used in poll() to check if vb2 is still waiting for
  *		buffers. Only set for capture queues if qbuf has not yet been
  *		called since poll() needs to return %EPOLLERR in that situation.
+ * @waiting_in_dqbuf: set by the core for the duration of a blocking DQBUF, when
+ *		it has to wait for a buffer to become available with vb2_queue->lock
+ *		released. Used to prevent destroying the queue by other threads.
  * @is_multiplanar: set if buffer type is multiplanar
  * @is_output:	set if buffer type is output
  * @copy_timestamp: set if vb2-core should set timestamps
@@ -611,7 +620,7 @@ struct vb2_queue {
 	unsigned int			buf_struct_size;
 	u32				timestamp_flags;
 	gfp_t				gfp_flags;
-	u32				min_buffers_needed;
+	u32				min_queued_buffers;
 
 	struct device			*alloc_devs[VB2_MAX_PLANES];
 
@@ -619,8 +628,9 @@ struct vb2_queue {
 	struct mutex			mmap_lock;
 	unsigned int			memory;
 	enum dma_data_direction		dma_dir;
-	struct vb2_buffer		*bufs[VB2_MAX_FRAME];
+	struct vb2_buffer		**bufs;
 	unsigned int			num_buffers;
+	unsigned int			max_num_buffers;
 
 	struct list_head		queued_list;
 	unsigned int			queued_count;
@@ -747,7 +757,7 @@ int vb2_wait_for_all_buffers(struct vb2_queue *q);
 /**
  * vb2_core_querybuf() - query video buffer information.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer struct passed from userspace.
  *
  * Videobuf2 core helper to implement VIDIOC_QUERYBUF() operation. It is called
@@ -759,7 +769,7 @@ int vb2_wait_for_all_buffers(struct vb2_queue *q);
  *
  * Return: returns zero on success; an error code otherwise.
  */
-void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb);
+void vb2_core_querybuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb);
 
 /**
  * vb2_core_reqbufs() - Initiate streaming.
@@ -823,7 +833,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
  * vb2_core_prepare_buf() - Pass ownership of a buffer from userspace
  *			to the kernel.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer structure passed from userspace to
  *		&v4l2_ioctl_ops->vidioc_prepare_buf handler in driver.
  *
@@ -839,13 +849,13 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory,
  *
  * Return: returns zero on success; an error code otherwise.
  */
-int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb);
+int vb2_core_prepare_buf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb);
 
 /**
  * vb2_core_qbuf() - Queue a buffer from userspace
  *
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
- * @index:	id number of the buffer
+ * @vb:		pointer to struct &vb2_buffer.
  * @pb:		buffer structure passed from userspace to
  *		v4l2_ioctl_ops->vidioc_qbuf handler in driver
  * @req:	pointer to &struct media_request, may be NULL.
@@ -867,7 +877,7 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb);
  *
  * Return: returns zero on success; an error code otherwise.
  */
-int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb,
+int vb2_core_qbuf(struct vb2_queue *q, struct vb2_buffer *vb, void *pb,
 		  struct media_request *req);
 
 /**
@@ -931,7 +941,7 @@ int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);
  * @fd:		pointer to the file descriptor associated with DMABUF
  *		(set by driver).
  * @type:	buffer type.
- * @index:	id number of the buffer.
+ * @vb:		pointer to struct &vb2_buffer.
  * @plane:	index of the plane to be exported, 0 for single plane queues
  * @flags:	file flags for newly created file, as defined at
  *		include/uapi/asm-generic/fcntl.h.
@@ -945,7 +955,7 @@ int vb2_core_streamoff(struct vb2_queue *q, unsigned int type);
  * Return: returns zero on success; an error code otherwise.
  */
 int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type,
-		unsigned int index, unsigned int plane, unsigned int flags);
+		    struct vb2_buffer *vb, unsigned int plane, unsigned int flags);
 
 /**
  * vb2_core_queue_init() - initialize a videobuf2 queue
@@ -1140,6 +1150,15 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
 }
 
 /**
+ * vb2_get_num_buffers() - get the number of buffer in a queue
+ * @q:		pointer to &struct vb2_queue with videobuf2 queue.
+ */
+static inline unsigned int vb2_get_num_buffers(struct vb2_queue *q)
+{
+	return q->num_buffers;
+}
+
+/**
  * vb2_is_busy() - return busy status of the queue.
  * @q:		pointer to &struct vb2_queue with videobuf2 queue.
  *
@@ -1147,7 +1166,7 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
  */
 static inline bool vb2_is_busy(struct vb2_queue *q)
 {
-	return (q->num_buffers > 0);
+	return vb2_get_num_buffers(q) > 0;
 }
 
 /**
@@ -1239,6 +1258,12 @@ static inline void vb2_clear_last_buffer_dequeued(struct vb2_queue *q)
 static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q,
 						unsigned int index)
 {
+	if (!q->bufs)
+		return NULL;
+
+	if (index >= q->max_num_buffers)
+		return NULL;
+
 	if (index < q->num_buffers)
 		return q->bufs[index];
 	return NULL;