Some feedback regarding xf86-video-ati and the randr-1.2 branch.

[Alex Deucher]

On 5/29/07, Erik Andrén <erik.andren at gmail.com> wrote:
>
> Hello.
>
> 2007/5/29, Alex Deucher <alexdeucher at gmail.com>:
> > On 5/28/07, Erik Andrén <erik.andren at gmail.com> wrote:
> > > Hi.
> > > I've compiled this branch against xserver 1.3 and everything boots up
> > > fine. Here are the issues I'm currently experiencing:
> >
> > It looks like you are using an older version of the branch.
>
>
> Yeah, I'm compiling against the current version supplied in Ubuntu Gutsy
> gibbon.
>

I meant it looks like you are running an older version of the radeon
randr driver :)

> > >
> > > 1. The DPI value differs against the value calculated in the 6.6.3
> > > version of the driver.
> >
>
> > Are you using a distro provided driver?  Some of the distros include a
> > patch that grabs the panel EDID via vbe.  There is work going on to
> > grab this information directly from the rom.  That should fix the dpi
> > values.
>
>
> Same goes here, I've compared against the latest driver supplied in gutsy.
>
> > >
> > > 2. DRI memory allocation fails. Is there something I need to enter into
> > > my xorg.conf to prevent this from happening or is there a bug somewhere?
> > >
> >
> > Right.  By default the driver allocates enough vram for a framebuffer
> > 2708x1152.  Change the numbers in radeon_driver.c on this line, to
> > reduce the default size:
> >
> > xf86CrtcSetSizeRange (pScrn, 320, 200, 2708, 1152);
>
> I will try it out tonight and report back if it doesn't work as expected.
> In the future, is there going to be mechanism in the driver preventing this
> kind of over-allocation of memory, or is the framebuffer size more important
> than DRI?

Sure, when we get support for the drm memory manager ;)
It depend whether you want dualhead or DRI...
Unfortunately, right now, since we allocate everything statically, we
have to over-allocate if you want to have a framebuffer big enough for
dualhead, otherwise all you will be able to do is single head and
clones.  The intel driver allows you to change the allocation at
server start by changing the virtual size in the xorg.conf.  This may
work on radeon as well, but I haven't really looked into it yet.

Alex