[Openchrome-users] TV-Out / VIA P4N800 PRO / S-Video / VT1625

[Max Baker]

Hi All,

I'm still hoping that someone can get me started on debugging S-Video /
TV-Out w/ Openchrome. 

Does anyone know of a way to dump the chipset settings/registers while
running the viaarena driver, so that I can use those settings inside
openchrome.  I assume this would be a modification to one of the .h files
that sets the mode/timings.

Thanks,
-m

On Sun, Nov 25, 2007 at 06:50:47PM -0800, Max Baker wrote:
> Hi,
> 
> I'm trying to get S-Video / TV-Out working on OpenChrome w/ an
> Via EN15000G motherboard.  This has a CN700 chipset and a VT1625m tv chip
> (http://www.via.com.tw/en/products/mainboards/motherboards.jsp?motherboard_id=399)
> 
> I've been through the following pages :
>     http://wiki.openchrome.org/tikiwiki/tiki-index.php?page=TVOut 
>     http://billionmonkeys.net/openchrome/
>     http://www.kingcot.eclipse.co.uk/unichrome/unichromeTvOut.html
> 
> and a few more.
> 
> I'm trying to "get involved" and "get my hands dirty" as noted in the
> TVOut wiki page, but I'm not sure where to from here.
> 
> I have modelines for 640x480, 720x480, 720x480under/fit/over and the
> settings in my xorg.conf to turn on the S-Video port.   However, each of
> these is timed wrong for my TV and is a bit scrambled.
> 
> I have successfully got the viaarena binary driver up and running and
> outputting at 720x480.  The s3utility works as well and I am able to
> change the despeckle filter, color, tint, etc.   It is unstable as
> expected.
> 
> my question!  What can I tweak with to get a working modeline like here:
> http://clients.teksavvy.com/~khuisman/openchrome/latestdiff  ?
> 
> I am hoping there is someway I can just dump the configuration registers
> on the 1625 chip over the I2C bus while the ViaArena driver is up and
> running and then copy those settings over to via_vt162x.h on the
> openchrome driver. 
> 
> Any other instructions on how to extend the driver to support my
> particular combo are most welcome.
> 
> Cheers,
> -m