[Openchrome-users] [openChrome] #320: Request: Support for chrontel ch7301 dvi transmitter

[OpenChrome Trac]

#320: Request: Support for chrontel ch7301 dvi transmitter
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Reporter:  mg_2504      |       Owner:  somebody   
    Type:  enhancement  |      Status:  new        
Priority:  major        |   Component:  dvi-out    
 Version:  trunk        |    Keywords:  dvi, ch7301
Blocking:               |   Blockedby:             
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 Hello,

 I have a delock 32714 mainboard, which is a mini-itx mb with via C7
 prozessor and CN896 chipset.
 The mb has a chrontel ch7301c dvi transmitter (reading from the lable on
 the chip).
 I would like to connect my tv-set via dvi-hdmi, so I would like to try
 helping to implement support for the ch7301c.

 The openchrom driver (svn 781) 'recognises' the chip in via_ch7xxx.c as
 CH7011 tv-decoder since
 both chips have in register 0x4B the same id (0x17) - this I have from the
 chrontel doku.
 The chips could be distinguished by checking register 0x4A, but this would
 be for shure only a very first step.

 If the informations in ticket #88
 are still valid the support for dvi in general seems to be very limited
 right now? (In via_bios.h there is no VIA_DEVICE_DVI?)

 Here I need some help:
 Could someone please roughly describe what steps are necessary to
 implement a (new) dvi transmitter.
 Would a dvi device run as DFP device?
 Is there some 'fundermental dvi' support in the driver?

 There are full informations about the ch7301 on the chrontel web-side
 <http://www.chrontel.com/products/7301.htm>. If I am right implementing a
 dvi trasmitter seems to be 'easier' then implementing a tv-out chip. The
 dvi-transmitter is just taking the input from the graphic controller
 without any scaling etc.

 Thank you a lot for your help,
 best regards
 Malte

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Ticket URL: <http://www.openchrome.org/trac/ticket/320>
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