[linux-dvb] ATSC card with 2 RF inputs.

Michael Krufky mkrufky at m1k.net
Fri Jul 15 20:25:53 CEST 2005

Mac Michaels wrote:

>The DViCO FusionHDTV 3 Gold-Q card had two RF input 
>connectors and the ability to select either one of them.  

>My proposed solution is to modify the current lgdt3302 driver to select the ANT input 
>when 8VSB is selected or the CABLE input when QAM64 / QAM256 is selected.

I don't think that the right place to do this is within the lgdt3302 
driver.  My board, DViCO FusionHDTV3 Gold-T has only one RF input.  I 
use the same rf input to use OTA VSB as I use for cable QAM.  I think 
that if you altered the frontend like this, it could break the usability 
on my board.  The correct place to do this is somewhere card-specific, 
like cx88-cards.c ... Meanwhile, I understand your entire point is that 
cx88-cards deals with video4linux analog inputs, and you're looking for 
an ATSC solution for multiple RF.

The frontend driver should remain portable enough such that any new 
board coming out that uses the lgdt3302 chip can use the lgdt3302 
driver, simply by making the appropriate alterations in dvb-pll, 
cx88-dvb.c and cx88-cards.c such as the method that I added Gold-T card 
in the patch (already applied) located at:


It shouldn't matter how many rf inputs are on the board.... lgdt3302 
should NOT care about that.  Maybe there is another way in the dvb 
subsystem to take care of this?  Anybody have any ideas?

Michael Krufky

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