Re: XFree86 4.1.0 and CyberstormPPC

[Michel <mi...@da...>]

On Mon, 2002-10-07 at 19:32, Giorgio Terzi wrote:=20
>=20
> as i said time ago i had problems with XFree86 some still remain
> but one i think i have solved:
> I had a problem of bad addressing during Xdm (Kdm-Gdm) loading
> that trashed all the graphics with these symptoms: background sometimes
> trashed, graphics and widgets in the greetings window become invisible
> but selectable.
> Note that these problems was found also before the CyberstormPPC
> firmware upgrading.
> After firmware upgrading i have seen that there was some differences betw=
een
> the PCI addressing declaration in apus_pci.c & pm2fb.c files and what the=
 new
> ROM firmware reported.
> I attack my dmesg file where is possible to see this adresses difference
> and some (i think) non-influent Zorro vs. PCI address space conflicts.
>=20
> I have tried the modifies below and now seems that this problem is solved=
:
>=20
> diff -urN orig/apus_pci.c modif/apus_pci.c
> --- orig/apus_pci.c	Sun Oct 28 12:44:01 2001
> +++ modif/apus_pci.c	Sun Sep  1 11:46:07 2002
> @@ -167,7 +167,9 @@
>  	DEFW();
>  	writel(CVPPC_FB_APERTURE_ONE, apus_hose->cfg_data + PCI_BASE_ADDRESS_1)=
;
>  	DEFW();
> -	writel(CVPPC_FB_APERTURE_TWO, apus_hose->cfg_data + PCI_BASE_ADDRESS_2)=
;
> +	writel(0xe0800000, apus_hose->cfg_data + PCI_BASE_ADDRESS_2);
> +	DEFW();
> +	writel(CVPPC_FB_APERTURE_TWO, apus_hose->cfg_data + PCI_BASE_ADDRESS_3)=
;
>  	DEFW();
>  	writel(CVPPC_ROM_ADDRESS, apus_hose->cfg_data + PCI_ROM_ADDRESS);
>  	DEFW();
> diff -urN orig/pm2fb.c modif/pm2fb.c
> --- orig/pm2fb.c	Tue Aug 20 14:47:29 2002
> +++ modif/pm2fb.c	Sun Sep  1 11:47:22 2002
> @@ -998,7 +998,8 @@
>  		WR32(p->pci_config, PCI_CACHE_LINE_SIZE, 0xff00);
>  	WR32(p->pci_config, PCI_BASE_ADDRESS_0, CVPPC_REGS_REGION);
>  	WR32(p->pci_config, PCI_BASE_ADDRESS_1, CVPPC_FB_APERTURE_ONE);
> -	WR32(p->pci_config, PCI_BASE_ADDRESS_2, CVPPC_FB_APERTURE_TWO);
> +	WR32(p->pci_config, PCI_BASE_ADDRESS_2, 0xe0800000);
> +	WR32(p->pci_config, PCI_BASE_ADDRESS_3, CVPPC_FB_APERTURE_TWO);
>  	WR32(p->pci_config, PCI_ROM_ADDRESS, CVPPC_ROM_ADDRESS);
>  	DEFW();
>  	WR32(p->pci_config, PCI_COMMAND, 0xef000000 |
>=20
> I wish to submit these modifies if you think they have "a sense" .

Will these modifications also work with older firmware or whatever makes th=
e
difference?


> The warbled text problem i signaled succedes only in the X text windows a=
s
> Xterm or Mozilla and so on. I think this is a driver's limitation because=
=20
> with 1024x768x16 resolution this succedes only when the machine is very=20
> stressed but with 1152x864x16 and over this succedes everytime i open a=20
> window. With these high resolutions it warbles also the graphics.

Sounds like bus contention and/or synchronization problems in the 2D
acceleration code.


--=20
Earthling Michel D=E4nzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast