From: Tomi Valkeinen Date: Mon, 27 Jan 2014 09:29:53 +0000 (+0200) Subject: OMAPDSS: DISPC: decimation rounding fix X-Git-Tag: v3.14-rc3~21^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eec77da2744b1265653ab99af91c3b26c49501e9;p=pandora-kernel.git OMAPDSS: DISPC: decimation rounding fix The driver uses DIV_ROUND_UP when calculating decimated width & height. For example, when decimating with 3, the width is calculated as: width = DIV_ROUND_UP(width, decim_x); This yields bad results for some values. For example, 800/3=266.666..., which is rounded to 267. When the input width is set to 267, and pixel increment is set to 3, this causes the dispc to read a line of 801 pixels, i.e. it reads a wrong pixel at the end of the line. Even more pressing, the above rounding causes a BUG() in pixinc(), as the value of 801 is used to calculate row increment, leading to a bad value being passed to pixinc(). This patch fixes the decimation by removing the DIV_ROUND_UP()s when calculating width and height for decimation. Signed-off-by: Tomi Valkeinen --- Reading git-diff-tree failed