From: Prashant Laddha <prladdha@cisco.com>
Date: Wed, 4 Feb 2015 09:07:31 +0000 (-0300)
Subject: [media] vivid sdr: Use LUT based implementation for sin/cos()
X-Git-Tag: omap-for-v4.2/o2_dc~62^2~1^2~340
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e30a37345e6f723553d457becc423efa4bf2703;p=pandora-kernel.git

[media] vivid sdr: Use LUT based implementation for sin/cos()

The common implementation for sin/cos in include/linux/fixp-arith.h
has been improved recently to provide higher precision.

Replacing native implementation of sin/cos in vivid sdr with common
implementation. This serves two purposes:

1. Improved accuracy: the native implementation based on the Taylor
   series is more prone to rounding errors.
2. Reuse of common function: this is better compared to maintaining
   native versions for each driver.

Suggested by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Prashant Laddha <prladdha@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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