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OMAP: DSS2: adjust YUV overlay width to be even 

An overlay in YUV mode has to have an even input width, because data for
each pixel is divided between two adjacent pixels.

The algorithm handling manual update overlay adjusting may adjust the
overlay width to be odd.

This patch adds a check for that situation, and makes the width even.
The width is increased by one if it is possible (the unadjusted input
width is larger than the width), and decreased by one if increasing is
not possible.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Tomi Valkeinen 2010-06-03 16:27:46 +03:00
parent 5cb33e2166
commit f55fdcfe88
1 changed files with 15 additions and 0 deletions
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15
drivers/video/omap2/dss/manager.c
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@ -813,6 +813,21 @@ static int configure_overlay(enum omap_plane plane)
w = w * outw / orig_outw;
h = h * outh / orig_outh;
/* YUV mode overlay's input width has to be even and the
* algorithm above may adjust the width to be odd.
*
* Here we adjust the width if needed, preferring to increase
* the width if the original width was bigger.
*/
if ((w & 1) &&
(c->color_mode == OMAP_DSS_COLOR_YUV2 ||
c->color_mode == OMAP_DSS_COLOR_UYVY)) {
if (orig_w > w)
w += 1;
else
w -= 1;
}
}
r = dispc_setup_plane(plane,