[Openchrome-devel] Fix vt1625 output sensing

[Harry de Boer]

Hi,

I have made some progress:

- I updated the output sensing patch to support the VT1625S. The power 
register has the same layout as the status register. A 0 is always for 
the DACs that are not present, so writing all 1-bits and reading back 
the register results in a mask of which DACs are actually present.

- The number of tv registers on the VT1625 is 0x82, not 0x6C. This 
should not matter for anything currently in place.

- The tv screen is lighting up now. Apparently 
xf86OutputPtr->possible_crtcs should have a value of 1 or higher for it 
to be a valid configuration.

Don't get excited yet, the output is a complete mess. It seems the 
driver only reports one modeline, 640x480, which I believe has never 
worked for me anyway. Only 720x576 worked. I guess that is because the 
some of the registers are not set correctly and 720x576 works because it 
is the default set by the BIOS (for PAL).

But first I'll try to get the driver to report all supported modelines. 
Attached are the patches of what I have so far.

On 23-11-12 00:40, Willem van Asperen wrote:
> I've applied Harry's patch and it now correctly senses the TV-Out, so 
> good work Harry!

I kind of expected it to work for you since we seem to have exactly the 
same board :-)

Cheers,
Harry
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