V4L/DVB (13618): v4l2: Adding helper function to get dv preset description
This patch adds a helper function to get description of a digital video preset added by the video timing API. This will be useful for drivers implementing the above API. Signed-off-by: NMuralidharan Karicheri <m-karicheri2@ti.com> Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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