[Openchrome-users] Support for S3 Graphics DeltaChrome, GammaChrome and ChromeS20 generation

[Luc Verhaegen]

On Tue, Mar 20, 2007 at 12:10:00PM +0100, Stefan Bassing wrote:
> Hello!
> 
> Thanks for your reply. I was just making those lspci outputs. The vendor
> and device IDs you have discovered are correct. Nonetheless, S3 Graphics
> is the developer of the graphic cores of the IGPs from VIA and K8M890 is
> just the integrated version of DeltaChrome S8 oder GammaChrome S18
> (which is in fact identical to ChromeS27). So in my somehow simple
> thoughts, it could work if the openchrome driver is somehow (I think you
> know a lot more about this than me) modified that it accepts the vendor
> and device IDs for the K8M890 part of the driver. As I said before, I'm
> really no expert in programming, especially with Linux, but could it be
> possible to make some experimental versions of that specific driver
> parts for testing?
> 
> Docs from S3 Graphics are as non-existant as from VIA. Same policy... If
> it would help you or another developer, I would send you my DeltaChrome
> S8 card for devloping a working 2D driver!
> 
> Anyway here the outputs from lspci -vn (made with Knoppix 5.1):
> DeltaChrome S8, AGP 8x, 256 MB RAM:
> 01:00.0 0300: 5333:8e00 (rev 01) (prog-if 00 [VGA])
>        Subsystem: 5333:8e00
>        Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11
>        Memory at fde00000 (32-bit, non-prefetchable) [size=512K]
>        Memory at e0000000 (32-bit, prefetchable) [size=256M]
>        [virtual] Expansion ROM at fde80000 [disabled] [size=64K]
>        Capabilities: [dc] Power Management version 2
>        Capabilities: [80] AGP version 3.0
>        Capabilities: [c0] Message Signalled Interrupts: Mask- 64bit-
> Queue=0/0 Enable-
> 
> Chrome S27, PCI-Express, 128 MB RAM:
> 02:00.0 0300: 5333:8e48 (rev 01) (prog-if 00 [VGA])
>        Subsystem: 5333:0122
>        Flags: bus master, fast devsel, latency 0, IRQ 10
>        Memory at fe980000 (32-bit, non-prefetchable) [size=512K]
>        Memory at d0000000 (32-bit, prefetchable) [size=256M]
>        Expansion ROM at fe970000 [disabled] [size=64K]
>        Capabilities: [dc] Power Management version 2
>        Capabilities: [40] Express Legacy Endpoint IRQ 0
>        Capabilities: [c0] Message Signalled Interrupts: Mask- 64bit-
> Queue=0/0 Enable-
> 
> Perhaps you could do something with this...
> 
> Please let me know if I could help in any way!
> 
> greetings
> 
> Stefan
> 
> P.S.: Sorry for sending this first directly! I was a bit confused with 
> the handling of the mailing list.
> 
Feel free to hand me some rom dumps: look in 
http://unichrome.cvs.sourceforge.net/unichrome/utils/, there's a rather 
simplistic dumper there.

I knew from BIOS images that k8m890 was highly compatible (basic init 
and modesetting only of course), days before VIA finally released code. 
I doubt that this will be repeatable with the discrete cards. My gut 
feeling is that even basic init and modesetting will be different.

So do get me the images, i'll have a quick look to see whether this is a 
full image. If not, i will, at some point, provide you with a pci 
aperture based rom dumper, as i've been thinking about doing this for a 
longer while.

I will not suddenly pool a massive amount of time in this. Even though 
i'm, by now, very experienced disassembling VIAs roms, this always takes 
a lot of time. There will hopefully be a direct relation between the 
roms for all these cards.

So i will not go and do this right now, but if i don't get those roms, 
there is absolutely no chance that anyone will go and verify these 
things. Well, in a meaningful manner that is.

Luc Verhaegen.
http://unichrome.sf.net/