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media: vb2: Fix buf_out_validate documentation 

The .buf_out_validate callback is mandatory for OUTPUT
queues. Mark it as such in the callback's doc.

Fixes: 28d77c21cb ("media: vb2: add buf_out_validate callback")

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Ezequiel Garcia 2019-02-05 16:11:15 -05:00 committed by Mauro Carvalho Chehab
parent 9bcb830bfc
commit c2d88e7d66
1 changed files with 2 additions and 1 deletions
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3
include/media/videobuf2-core.h
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@ -345,7 +345,8 @@ struct vb2_buffer {
* waiting for a new buffer to arrive.
* @buf_out_validate: called when the output buffer is prepared or queued
* to a request; drivers can use this to validate
* userspace-provided information; optional.
* userspace-provided information; this is required only
* for OUTPUT queues.
* @buf_init: called once after allocating a buffer (in MMAP case)
* or after acquiring a new USERPTR buffer; drivers may
* perform additional buffer-related initialization;