[maemo-developers] Howto configure borderless 4:3 tv-out on n900?

[From: Frantisek Dufka]

I don't know if there is some high level api but a lot of things can be 
done either via framebuffer ioctl or via changing stuff in 
/sys/dev/ices/platform/omapdss/ see

http://gitorious.org/linux-omap-dss2/linux/blobs/master/Documentation/arm/OMAP/DSS

Having full PAL or NTSC with no translation/scaling would be good both 
for games and video playback too.

So far I have only succeeded to change the default 800x480 -> TV scaling 
to be a bit better so it is no longer fuzzy due to extra downscaling. On 
my TV I can get exactly 480 lines visible in PAL mode which makes 
reading text much better.
http://talk.maemo.org/showthread.php?p=461660#post461660


For NTSC output (640x480) it would be enough to render to part of the 
screen and set the size and offset accordingly. For full PAL it would 
need resizing framebuffer to get more lines (ioctl?).

I wonder how OMAP3 display controller features (gfx,vid1,vid2 planes, 
scaling, mirroring, rotation, tv-out) are mapped to Xv and other X APIs.

Frantisek