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authorBenjamin Gaignard <benjamin.gaignard@collabora.com>2023-12-11 16:32:49 +0300
committerHans Verkuil <hverkuil-cisco@xs4all.nl>2023-12-13 19:31:27 +0300
commit80c2b40a51393add616a1fd186a1cc10bd676a3f (patch)
tree228411e748bc8df6e974b624eb4703c9d75e5fe7 /include/media
parenta3e28ea7771794c2938637f95a4d7a957f45465e (diff)
downloadlinux-80c2b40a51393add616a1fd186a1cc10bd676a3f.tar.xz
media: videobuf2: core: Rename min_buffers_needed field in vb2_queue
Rename min_buffers_needed into min_queued_buffers and update the documentation about it. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> [hverkuil: Drop the change where min_queued_buffers + 1 buffers would be] [hverkuil: allocated. Now this patch only renames this field instead of making] [hverkuil: a functional change as well.] [hverkuil: Renamed 3 remaining min_buffers_needed occurrences.]
Diffstat (limited to 'include/media')
-rw-r--r--include/media/videobuf2-core.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 5557d78b6f20..56719a26a46c 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -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
@@ -546,10 +546,13 @@ 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.
*/
/*
* Private elements (won't appear at the uAPI book):
@@ -614,7 +617,7 @@ 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];