Re: aty128fb and EDID

["Kevin B. Hendricks" <kevin.hendricks@sympatico.ca>]

Hi,

Steal the code from the radeon dirver in the kernel.  It finds and parses
the EDID block in OF for ppc linux systems for LCD.

It works fine with my 17 in lcd display.

Kevin

On February 9, 2003 06:26, Magnus Damm wrote:
> Hi,
>
> I recently bought a Cube G4 and got a 17" Apple Studio Display (CRT,
> ADC) with it. However, that combination seems hard to use out of the box
> if you want to use something else than the open firmware framebuffer.
>
> The thing is that the monitor only supports two modes:
> 1600x1200 64Hz
> 1280x1024 75Hz
>
> This gives me no picture at all when I try to use the aty128 driver.
>
> However, when I hardcode this video mode as default things work out ok:
> /* default modedb mode */
> /* 1600x1200, 64Hz, Non-Interlaced */
> static struct fb_videomode defaultmode __initdata = {
>         refresh:        64,
>         xres:           1600,
>         yres:           1200,
>         pixclock:       5952,
>         left_margin:    304,
>         right_margin:   24,
>         upper_margin:   38,
>         lower_margin:   1,
>         hsync_len:      184,
>         vsync_len:      3,
>         sync:           3,
>         vmode:          FB_VMODE_NONINTERLACED
> };
>
> The information above was built from my EDID file.
>
> To create some kind of generic solution I need to add EDID support to
> the aty128 driver, or even better - a generic framebuffer layer.
>
> My question to you is:
> All probing that is done by checking if "machine_is_compatible()", could
> that all be replaced by EDID code?
>
> If you could send me your EDID files with together with information
> about your machine and monitor I would be really happy. Then I could
> parse them and see if they contain enough information. If you don't find
> any EDID file then I would be glad to know that too.
>
> These machines are extra interesting:
> * PowerMac2,1 first r128 iMacs
> * PowerMac2,2 summer 2000 iMacs
> * PowerMac4,1 january 2001 iMacs "flower power"
> * iBook SE
> * PowerBook Firewire (Pismo), iBook Dual USB
> * PowerBook Titanium
>
> I find my EDID file in /proc/device-tree/pci/ATY,Rage128Pd@10/EDID
>
> Thanks.
>
> / magnus
>


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