[media] v4l2-dv-timings: fix CVT calculation

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This patch fixes two errors that caused incorrect format detections:
The first bug is in the calculation of the vertical backporch: the combined
period of vsync and backporch must *exceed* a certain minimum value, and not
be equal to it.
The second bug is a rounding error in the reduced blanking calculation:
expand the ideal_duty_cylce to be in parts per ten thousand to avoid
rounding errors.

Signed-off-by: Martin Bugge <marbugge@cisco.com>
Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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Martin Bugge 2013-08-14 04:58:38 -03:00 • committed by Mauro Carvalho Chehab

parent 1056e4388b

commit c3e75c7d5e

1 changed files with 9 additions and 10 deletions

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drivers/media/v4l2-core/v4l2-dv-timings.c

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