[Intel-gfx] [PATCH] drm/i915: encoder/connector internal structure rework

[Zhenyu Wang]

On 2010.03.02 11:01:41 +0800, ykzhao wrote:
> > > Why? As from sdvo spec, I think both s-video/composite could exist,
> > > and
> > > for TMDS0/1 too. It just forces that when TMDS1 exists, there must be
> > > TMDS0.
> > 
> > Hmm.. I doubt if more than one of CVBS/COMP/SVID could work simultaneously, even though there is a kind of SDVO TV card that have these 3 interfaces. blending them together as one connector called TV may be better. Just like the intgegrated TV, even though sometimes we can see more than one built-in connector ( 80% only have one external connector though ), they can't work at the same time.
> 
> I agree. It seems that the SDVO-TV card can report its capability that
> it can support CVBS/SVIDE/COMP. As they use the same SDVO-TV encoder,
> maybe they can't work simultaneously.
> 
> At most cases the SDVO-DVI card will export only one external connector.
> Even when it can export more than one connector, the two connectors
> can't work simultaneously as one SDVO encoder is shared by the two
> connectors.
> 

This actually doesn't conflict with current code, as we already assumed
only one type of connector can work with SDVO encoder for a single time, 
the 'attached_output' is set to response value for GetAttachedDisplays request.

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