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| author | Benjamin Gaignard <benjamin.gaignard@collabora.com> | 2023-11-09 19:35:00 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2023-11-23 14:38:05 +0300 |
| commit | d055a76c006540defd4eb80dcdea217cee0a141a (patch) | |
| tree | a950d391cfd3be26f0ffc2672c066472fd032446 /drivers/media/common | |
| parent | c838530d230bc638d79b78737fc4488ffc28c1ee (diff) | |
| download | linux-d055a76c006540defd4eb80dcdea217cee0a141a.tar.xz | |
media: core: Report the maximum possible number of buffers for the queue
Use one of the struct v4l2_create_buffers reserved bytes to report
the maximum possible number of buffers for the queue.
V4l2 framework set V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS flags in queue
capabilities so userland can know when the field is valid.
Does the same change in v4l2_create_buffers32 structure.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/common')
| -rw-r--r-- | drivers/media/common/videobuf2/videobuf2-v4l2.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index 3d71c205406d..440c3b1c18ec 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -756,6 +756,8 @@ int vb2_create_bufs(struct vb2_queue *q, struct v4l2_create_buffers *create) fill_buf_caps(q, &create->capabilities); validate_memory_flags(q, create->memory, &create->flags); create->index = vb2_get_num_buffers(q); + create->max_num_buffers = q->max_num_buffers; + create->capabilities |= V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS; if (create->count == 0) return ret != -EBUSY ? ret : 0; |