Re: PowerPC radeon KMS - is it possible?

On Mit, 2012-04-18 at 20:37 +1000, Benjamin Herrenschmidt wrote:=20

On Wed, 2012-04-18 at 20:35 +1000, Benjamin Herrenschmidt wrote:

quoted

On Wed, 2012-04-18 at 09:46 +0200, Andreas Schwab wrote:

quoted

Benjamin Herrenschmidt [off-list ref] writes:
=20

quoted

Note also that KMS doesn't afaik have the power management code tha=

t

quoted

quoted

quoted

radeonfb has for those old Mac chipsets, so suspend/resume won't wo=

rk.

quoted

quoted

=20
How hard would it be to add it?

=20
The code itself is relatively self contained, but the KMS power
management side is a bit ... messy :-)

That's an interesting way to put it, given the hacks to make it work
between radeonfb and uninorth_agp. :) (Which are complicating making at
least hibernation work with KMS on uninorth_agp)

In contrast, radeon KMS uses the standard Linux device suspend/resume
hooks.

quoted

So the real deal is to figure out how best to "hook it up" there.
=20
There's some duplication=20

=20
Argh... bloody x220 touchpad...
=20
So I was saying, there's also some duplication in the area of dynamic
clocks configuration. Some of this could be an issue as afaik, to work
reliably, the suspend/resume code really wants the stuff to be setup
exactly the way the code in radeon_pm does....

Are you referring to radeon_pm in radeonfb or radeon KMS?

Most of the latter isn't used on PPC laptops because it relies on an x86
video BIOS.


--=20
Earthling Michel D=C3=A4nzer           |                   http://www.amd.c=
om
Libre software enthusiast         |          Debian, X and DRI developer