Why querying of EDID is limited only to VBE version greater then 2.0?

2009-05-15 Thread Evgeny M. Zubok
I have S3 Trio64V2 with VBE 1.2 and I want to add the possibility of display autodetection via DDC to s3 driver. There is two ways to deal with DDC: (i) VESA BIOS Extension and (ii) directly from videochip's DDC registers. The later method currently is impossible to implement due to the lack of

Re: Why querying of EDID is limited only to VBE version greater then 2.0?

2009-05-15 Thread Krzysztof Halasa
Evgeny M. Zubok evgeny.zu...@tochka.ru writes: I have S3 Trio64V2 with VBE 1.2 and I want to add the possibility of display autodetection via DDC to s3 driver. There is two ways to deal with DDC: (i) VESA BIOS Extension and (ii) directly from videochip's DDC registers. The later method

Re: Why querying of EDID is limited only to VBE version greater then 2.0?

2009-05-15 Thread Simon Thum
Evgeny M. Zubok wrote: I have S3 Trio64V2 with VBE 1.2 and I want to add the possibility of display autodetection via DDC to s3 driver. There is two ways to deal with DDC: (i) VESA BIOS Extension and (ii) directly from videochip's DDC registers. The later method currently is impossible to

Re: Why querying of EDID is limited only to VBE version greater then 2.0?

2009-05-15 Thread Evgeny M. Zubok
Simon Thum simon.t...@gmx.de writes: AFAIK the DDC stuff was endorsed in 2.0, so it's probably just a heuristic, not a hard limit. I'm not the maintainer but I guess a good patch is appreciated. IIRC the vbe bios does advertise if it has the DDC extension, which should be a preferable