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

Round off image width to nearest 8 (GTF_CELL_GRAN)

A source sending a GTF (Generalized Timing Formula) format have no means of
signalling image width. The assumed aspect ratio may result in an odd image
width but according to the standard image width should be in multiple of 8.

Cc: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Martin Bugge <marbugge@cisco.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Martin Bugge 2014-01-23 06:40:00 -03:00 committed by Mauro Carvalho Chehab
parent 1ba6c90161
commit 257cc4b5c5
1 changed files with 1 additions and 0 deletions
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drivers/media/v4l2-core/v4l2-dv-timings.c
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@ -515,6 +515,7 @@ bool v4l2_detect_gtf(unsigned frame_height,
aspect.denominator = 9;
}
image_width = ((image_height * aspect.numerator) / aspect.denominator);
image_width = (image_width + GTF_CELL_GRAN/2) & ~(GTF_CELL_GRAN - 1);
/* Horizontal */
if (default_gtf)