R3XX lockup possible solution

[Peter Zubaj]

Hi,

I tested this on my card.

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R300 NE
[Radeon 9500 Pro] (prog-if 00 [VGA])
        Subsystem: ATI Technologies Inc Radeon R300 NE [Radeon 9500 Pro]
        Flags: bus master, stepping, 66MHz, medium devsel, latency 255,
IRQ 21
        Memory at d0000000 (32-bit, prefetchable) [size=128M]
        I/O ports at c800 [size=256]
        Memory at dfef0000 (32-bit, non-prefetchable) [size=64K]
        Expansion ROM at dfec0000 [disabled] [size=128K]
        Capabilities: <access denied>

First, I think, you shouldn't touch register 0x140, you write value 0x22
there. For my card there is 0x2D (this is power on default and is not
changed by fglrx). When value 0x22 is written there, I have got
corrupted console and X desktop too.

Basically I tried ut2004. With ColorTiling On. Without you fix computer
locked immediately (on game start, or in game menu). With this fix I was
able to play ut2004 for more then 10 minutes (without lock - for now I
don't have time to test more). I will try to compare other values with
values from dump from my card.

Peter Zubaj

On Sat, 2006-06-24 at 17:27 +0200, Jerome Glisse wrote:
> Attached is the possible initialization we lack for r3xx chipset, might also
> be usefull for r4xx. I am still not 100% confident that this solve lockup but
> i have been able to run things a lot longuer than before without lockup.
> 
> Thus i want other people to test this and report if this solve any lockup
> they might experience with r3xx/r4xx and DRI.
> 
> To use this change the #define ADDR to your card ADDR (use lspci -v)
> then gcc r300init.c -o initr300 quit any X, go the console run sync, launch
> the program (as root) rerun X and test with app which used to lockup.
> 
> You will have to press several time a key to go over initialization
> step in the program if it lockup your computer please report last
> things you see printed.
> 
> Report your status.
> 
> PS: Sorry for cross posting but i wanted to have as many tester as possible.
> 
> best,
> Jerome Glisse
> 
> To get the ADDR use lspci -v then this is second Memory at line of your
> graphic card for example:
> 
> 0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV350 NJ
> [Radeon 98 00 XT] (prog-if 00 [VGA])
>         Subsystem: Micro-Star International Co., Ltd.: Unknown device 9560
>         Flags: bus master, stepping, 66MHz, medium devsel, latency 64, IRQ 177
>         Memory at f0000000 (32-bit, prefetchable) [size=128M]
>         I/O ports at c000 [size=256]
>         Memory at fe9f0000 (32-bit, non-prefetchable) [size=64K]
>         Expansion ROM at fe9c0000 [disabled] [size=128K]
>         Capabilities: <available only to root>
> 
> #define ADDR 0xfe9f0000
> 
> 
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