Re: [Linux-fbdev-devel] [PATCH]: EDID parser

Sven Luther
2003-04-03T07:28:57Z

On Thu, Apr 03, 2003 at 03:07:33AM +0100, Petr Vandrovec wrote:
> On 2 Apr 03 at 22:55, James Simmons wrote:
>
> > It doesn't need a struct pci_dev in this case. It is possible to get this
> > info from the i2c bus but I never seen any drivers do this. What data would
> > we have to pass in get the EDID inforamtion? So the question is how
> > generic will get_EDID end up being or will we have to have driver specfic
> > hooks since I don't pitcure i2c approaches being the same for each video
> > card. Petr didn't you attempt this with the matrox driver at one time?
>
> Yes, matroxfb provides one i2c (DDC) bus for each output videocard has.
> I ended with only this support (and userspace EDID parser) as i2c was
> initialized loong after framebuffer at that time... Now when i2c is usable
> when fbdev initializes, it looks much better.
>
> Only get_EDID interface I need is one which gets i2c bus as argument. But
> I have no idea how I should handle situation where you have connected
> two different monitors to both crtc1 outputs... Like 50Hz PAL TV &
> 60+Hz VGA monitor. Currently it is user responsibility to resolve such
> situation...

Is the EDID reading stuff not done per head ?

Friendly,

Sven Luther