[Openchrome-users] DFP problems on Samsung NC20

[Matthieu Herrb]

Xavier Bachelot wrote:
> Matthieu Herrb wrote:
>> Hi
>>
>> since revision 742 of the driver (VX800 integrated TMDS support), I get
>> a black screen on the NC20 if running without and xorg.conf file.
>> Reverting that revision, or using an xorg.conf file that forces 'Option
>> "ActiveDevice" "LCD"' fixes the problem.
>>
>> after looking a bit closer to the code, this option as the effect of
>> ignoring the BIOS that pretends to support VIA_DEVICE_DFP.
>>
>> I don't know what the right fix could be, may be a new kind of model
>> depend quirk table is needed to disable the TDMS support on specific models?
>>
>> The patch attached, only enables it if the ViaCardId entry for a card
>> explicitely lists VIA_DEVICE_DFP. I don't know if it's the right
>> approach or not.
>>
> Using a table doesn't really scale, we need better outputs detection imho.
> I'd rather force the use of the ActiveDevice option to enable DFP for
> now. There are only a handful of boards with DVI output anyway (Epia
> M700, are there others ?).
> The attached patch shouldn't enable DFP output unless ActiveDevice is
> explicitly set to DFP. Does it do the job for you ?

Yes, that works for me too.

-- 
Matthieu Herrb