[ltp] Explore radeon(4) features, especially mergedfb and Metamodes.

[Stefan Schmidt]

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Hello.

On Mon, 2006-08-21 at 22:51, Alex Deucher wrote:
> On 8/21/06, Stefan Schmidt <stefan@sostec.de> wrote:
> >
> >- Add second monitor during the X session. (I read in Marius config file
> >  a comment that this could be possible if i define the frequencies of
> >  the monitor, so no probing is needed.)
>=20
> you can "force" on the secondary output so that it will already be
> active if you plug in a display at run time. =20

You mean something like this?

Option "MonitorLayout" "LVDS, CRT"

> However true hotplug is not yet possible, although it's in
> progress in the intel driver and should be available in a standard
> way once Keithp finishes he new multi-head capable revision of
> xrandr.

Nice to hear this. I'll track this feature now.

> >- The MergedNonRectangular option seems not to work for clone mode. And
> >  1280 on a 1400 screen looks ugly. Does this really not work, or i'm
> >  just to stupid?
>=20
> It's like that on purpose to avoid producing dead spots if you are
> only using one head and it's not clear where the smaller crtc should
> be positioned: top left, bottom right, etc.  If you want you can hack
> the driver to not adjust the frame of the smaller display in clone
> modes.  It would be pretty trivial to do.

Where do i have dead spots when i just clone the same desktop in
different resolutions?

Just to clarify. I'll like to see the same desktop i see on the
Laptop-Panel (1400x1050) on the second monitor. In a different
resolution. Maybe 1280x1024 or even 1600x1200.

hmm, it is possible to use an selfcompiled radeon driver inside my
debian xorg installation? If i need to compile xorg from scratch and
place it next to my distro installation i'll never start to hack on
it.

Anyway, i put this on my long todo list. :(

> >- It would be nice to dynamically change the position of the second
> >  monitor. At home it's on the left side and at work it's on the right.
> >  :)
>=20
> This should be possible with Keithp's new xrandr.  the problem now is
> that mergedfb still uses a fixed framebuffer size so you'd have to
> pre-allocate enough framebuffer for every possible orientation which
> would be wasteful.

So i've to move the dockingstation at work to the right side of my
monitor. ;)
Somebody plan to make used framebuffer size for mergefb dynamic?

> >Normally i should be able to use the stuff above to get a descent
> >workaround to undock my notebook without restarting X, but i use DVI
> >throught the dockingstation. Anybody know the exact status of using the
> >DVI port the same way i use the vga port? Alex?
>=20
> I assume you mean LVDS (laptop panel) simultaneously with TMDS (DVI)?

Right. I'm still a bit confused with this names.

> right how both LVDS and TMDS are hardcoded to crtc1 in the driver.
> I've had a series of ongoing paches to de-couple the outputs (TMDS,
> LVDS, DACs, etc.) from the crtcs.  Unfortunately, I don't have a
> laptop with a DVI port, so I haven't really made any progress on the
> front.
> patch for reference:
> http://www.botchco.com/alex/xorg/superpatch/modular/

OK, this is also the last state i had in mind.

Just as above, if i only need to recompile the radeon driver and put
it in the right dir, i can give it some testing.

regards
Stefan Schmidt

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