v4ldec: CF2 Make the margin configurable [1/1]

PD#SWPL-117816

Problem:
Make the margin configurable

Solution:
add V4L2_SET_AMLOGIC_MARGIN_NUM env to set margin num

Verify:
Yocto

Signed-off-by: le.han <le.han@amlogic.com>
Change-Id: Iaca3b05a882eb743862ca0534768384eed42d64e
1 file changed