[media] uvcvideo: Add UVCIOC_CTRL_QUERY ioctl

Browse source

This ioctl extends UVCIOC_CTRL_GET/SET by not only allowing to get/set
XU controls but to also send arbitrary UVC commands to XU controls,
namely GET_CUR, SET_CUR, GET_MIN, GET_MAX, GET_RES, GET_LEN, GET_INFO
and GET_DEF. This is required for applications to work with XU controls,
so that they can properly query the size and allocate the necessary
buffers.

Signed-off-by: Martin Rubli <martin_rubli@logitech.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

...

This commit is contained in:

Martin Rubli 2010-10-02 19:10:16 -03:00 • committed by Mauro Carvalho Chehab

parent 837d50b564

commit fe78d187fe

3 changed files with 88 additions and 36 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

92

drivers/media/video/uvc/uvc_ctrl.c

View file

19

drivers/media/video/uvc/uvc_v4l2.c

View file

13

drivers/media/video/uvc/uvcvideo.h

View file